diff --git a/.ipynb_checkpoints/lab-python-functions-checkpoint.ipynb b/.ipynb_checkpoints/lab-python-functions-checkpoint.ipynb
new file mode 100644
index 0000000..2eacb52
--- /dev/null
+++ b/.ipynb_checkpoints/lab-python-functions-checkpoint.ipynb
@@ -0,0 +1,362 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "25d7736c-ba17-4aff-b6bb-66eba20fbf4e",
+   "metadata": {},
+   "source": [
+    "# Lab | Functions"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0c581062-8967-4d93-b06e-62833222f930",
+   "metadata": {
+    "tags": []
+   },
+   "source": [
+    "## Exercise: Managing Customer Orders with Functions\n",
+    "\n",
+    "In the previous exercise, you improved the code for managing customer orders by using loops and flow control. Now, let's take it a step further and refactor the code by introducing functions.\n",
+    "\n",
+    "Follow the steps below to complete the exercise:\n",
+    "\n",
+    "1. Define a function named `initialize_inventory` that takes `products` as a parameter. Inside the function, implement the code for initializing the inventory dictionary using a loop and user input.\n",
+    "\n",
+    "2. Define a function named `get_customer_orders` that takes no parameters. Inside the function, implement the code for prompting the user to enter the product names using a loop. The function should return the `customer_orders` set.\n",
+    "\n",
+    "3. Define a function named `update_inventory` that takes `customer_orders` and `inventory` as parameters. Inside the function, implement the code for updating the inventory dictionary based on the customer orders.\n",
+    "\n",
+    "4. Define a function named `calculate_order_statistics` that takes `customer_orders` and `products` as parameters. Inside the function, implement the code for calculating the order statistics (total products ordered, and percentage of unique products ordered). The function should return these values.\n",
+    "\n",
+    "5. Define a function named `print_order_statistics` that takes `order_statistics` as a parameter. Inside the function, implement the code for printing the order statistics.\n",
+    "\n",
+    "6. Define a function named `print_updated_inventory` that takes `inventory` as a parameter. Inside the function, implement the code for printing the updated inventory.\n",
+    "\n",
+    "7. Call the functions in the appropriate sequence to execute the program and manage customer orders.\n",
+    "\n",
+    "Hints for functions:\n",
+    "\n",
+    "- Consider the input parameters required for each function and their return values.\n",
+    "- Utilize function parameters and return values to transfer data between functions.\n",
+    "- Test your functions individually to ensure they work correctly.\n",
+    "\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 117,
+   "id": "0d0b9f32-4d47-4fd8-817a-cd84ebe2b848",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "How many t-shirts are in the inventory? 5\n",
+      "How many mugs are in the inventory? 5\n",
+      "How many hats are in the inventory? 5\n",
+      "How many books are in the inventory? 5\n",
+      "How many keychains are in the inventory? 5\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'t-shirt': 5, 'mug': 5, 'hat': 5, 'book': 5, 'keychain': 5}\n"
+     ]
+    }
+   ],
+   "source": [
+    "#Inventory details\n",
+    "products = ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n",
+    "\n",
+    "#1: Define a function named initialize_inventory that takes products as a parameter. \n",
+    "#Inside the function, implement the code for initializing the inventory dictionary using a loop and user input.\n",
+    "\n",
+    "def initialize_inventory (products):\n",
+    "    inventory = {}\n",
+    "    for product in products:\n",
+    "        inventory[product] = int(input(f\"How many {product}s are in the inventory?\"))\n",
+    "    return inventory\n",
+    "\n",
+    "\n",
+    "inventory = initialize_inventory(products)\n",
+    "print(inventory)\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 119,
+   "id": "9719fecf-5d93-4823-98f3-2404845605e9",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Do you want to order a product? (yes/no):  yes\n",
+      "Enter the product you want to order:  mug\n",
+      "Do you want to order a product? (yes/no):  yes\n",
+      "Enter the product you want to order:  hat\n",
+      "Do you want to order a product? (yes/no):  no\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'hat', 'mug'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "#2 Define a function named get_customer_orders that takes no parameters. Inside the function, implement the code for prompting the user to enter the product names using a loop. \n",
+    "#The function should return the customer_orders set.\n",
+    "\n",
+    "def get_customer_orders():\n",
+    "    customer_orders = set()\n",
+    "    while True:\n",
+    "        order = input(\"Do you want to order a product? (yes/no): \")\n",
+    "        if order == \"yes\":\n",
+    "            product = input(\"Enter the product you want to order: \")\n",
+    "            customer_orders.add(product)\n",
+    "        elif order == \"no\":\n",
+    "            break\n",
+    "        else:\n",
+    "            print(\"Invalid input. Please answer with 'yes' or 'no'\")\n",
+    "        \n",
+    "    return customer_orders\n",
+    "\n",
+    "customer_orders = get_customer_orders()\n",
+    "print(customer_orders)\n",
+    "        "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 123,
+   "id": "2828a0b0-d991-4d12-abc8-bf0a0f7de17a",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'t-shirt': 5, 'mug': 5, 'hat': 5, 'book': 5, 'keychain': 5}\n",
+      "{'hat', 'mug'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "#3 Define a function named update_inventory that takes customer_orders and inventory as parameters. \n",
+    "#Inside the function, implement the code for updating the inventory dictionary based on the customer orders.\n",
+    "\n",
+    "def update_inventory(customer_orders, inventory):\n",
+    "    for product in customer_orders:\n",
+    "        if product in inventory:\n",
+    "            if inventory[product] > 0:\n",
+    "                inventory[product] -= 1\n",
+    "            elif product in inventory and inventory[product] <= 0:\n",
+    "                print(f\"There is not enough {product} on stock to fulfill the order!\")\n",
+    "\n",
+    "    return inventory\n",
+    "\n",
+    "print(inventory)\n",
+    "print(customer_orders)\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 125,
+   "id": "10f53296-bed3-4718-8b63-c9247dca9794",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "2\n",
+      "8%\n"
+     ]
+    }
+   ],
+   "source": [
+    "#4 Define a function named calculate_order_statistics that takes customer_orders and products as parameters. \n",
+    "#Inside the function, implement the code for calculating the order statistics (total products ordered, and percentage of unique products ordered). \n",
+    "#The function should return these values.\n",
+    "\n",
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    total_ordered = len(customer_orders)\n",
+    "    total_inventory = sum(inventory.values())\n",
+    "    percentage_ordered = (total_ordered / total_inventory) * 100\n",
+    "\n",
+    "    return total_ordered, percentage_ordered\n",
+    "\n",
+    "total_ordered, percentage_ordered = calculate_order_statistics(customer_orders, products)\n",
+    "\n",
+    "print(total_ordered)\n",
+    "print(f\"{round(percentage_ordered)}%\")\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 127,
+   "id": "4b615619-33ce-44e4-b00d-3d0465c44eae",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Order Statistics:\n",
+      "Total Products Ordered: 2\n",
+      "Percentage of Products Ordered: 8%\n"
+     ]
+    }
+   ],
+   "source": [
+    "#5 Define a function named print_order_statistics that takes order_statistics as a parameter. \n",
+    "#Inside the function, implement the code for printing the order statistics.\n",
+    "\n",
+    "def print_order_statistics(order_statistics):\n",
+    "    print(\"Order Statistics:\")\n",
+    "    print(f\"Total Products Ordered: {total_ordered}\")\n",
+    "    print(f\"Percentage of Products Ordered: {round(percentage_ordered)}%\")\n",
+    "    return\n",
+    "\n",
+    "print_order_statistics(order_statistics)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 129,
+   "id": "42bd3dcb-cff7-4d8b-abb5-998a2726f948",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Updated inventory after the order: {'t-shirt': 5, 'mug': 4, 'hat': 4, 'book': 5, 'keychain': 5}\n"
+     ]
+    }
+   ],
+   "source": [
+    "#Define a function named print_updated_inventory that takes inventory as a parameter. \n",
+    "#Inside the function, implement the code for printing the updated inventory.\n",
+    "\n",
+    "def print_updated_inventory(inventory):\n",
+    "    for product in customer_orders:\n",
+    "        if product in inventory and inventory[product] > 0:\n",
+    "            inventory[product] -= 1\n",
+    "        elif product in inventory and inventory[product] <= 0:\n",
+    "                print(f\"There is not enough {product} on stock to fulfill the order!\")\n",
+    "\n",
+    "    print(f\"Updated inventory after the order: {inventory}\")\n",
+    "    return\n",
+    "\n",
+    "print_updated_inventory(inventory)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 131,
+   "id": "5139693e-9edb-4db4-9f85-813f309d5bc2",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "How many t-shirts are in the inventory? 5\n",
+      "How many mugs are in the inventory? 6\n",
+      "How many hats are in the inventory? 8\n",
+      "How many books are in the inventory? 3\n",
+      "How many keychains are in the inventory? 7\n",
+      "Do you want to order a product? (yes/no):  4\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Invalid input. Please answer with 'yes' or 'no'\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Do you want to order a product? (yes/no):  yes\n",
+      "Enter the product you want to order:  hat\n",
+      "Do you want to order a product? (yes/no):  yes\n",
+      "Enter the product you want to order:  mug\n",
+      "Do you want to order a product? (yes/no):  no\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Order Statistics:\n",
+      "Total Products Ordered: 2\n",
+      "Percentage of Products Ordered: 8%\n",
+      "Updated inventory: {'t-shirt': 5, 'mug': 5, 'hat': 7, 'book': 3, 'keychain': 7}\n"
+     ]
+    }
+   ],
+   "source": [
+    "#7 Functions:\n",
+    "\n",
+    "products = ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n",
+    "\n",
+    "inventory = initialize_inventory(products)\n",
+    "\n",
+    "customer_orders = get_customer_orders()\n",
+    "\n",
+    "order_statistics = calculate_order_statistics(customer_orders, products)\n",
+    "\n",
+    "print_order_statistics(order_statistics)\n",
+    "\n",
+    "update_inventory(customer_orders, inventory)\n",
+    "\n",
+    "print(\"Updated inventory:\", inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "cf5c4c3b-0d5b-45bd-a650-6a2caa261af9",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.12.7"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/lab-python-functions.ipynb b/lab-python-functions.ipynb
index 44d337b..2eacb52 100644
--- a/lab-python-functions.ipynb
+++ b/lab-python-functions.ipynb
@@ -43,6 +43,299 @@
     "\n",
     "\n"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 117,
+   "id": "0d0b9f32-4d47-4fd8-817a-cd84ebe2b848",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "How many t-shirts are in the inventory? 5\n",
+      "How many mugs are in the inventory? 5\n",
+      "How many hats are in the inventory? 5\n",
+      "How many books are in the inventory? 5\n",
+      "How many keychains are in the inventory? 5\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'t-shirt': 5, 'mug': 5, 'hat': 5, 'book': 5, 'keychain': 5}\n"
+     ]
+    }
+   ],
+   "source": [
+    "#Inventory details\n",
+    "products = ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n",
+    "\n",
+    "#1: Define a function named initialize_inventory that takes products as a parameter. \n",
+    "#Inside the function, implement the code for initializing the inventory dictionary using a loop and user input.\n",
+    "\n",
+    "def initialize_inventory (products):\n",
+    "    inventory = {}\n",
+    "    for product in products:\n",
+    "        inventory[product] = int(input(f\"How many {product}s are in the inventory?\"))\n",
+    "    return inventory\n",
+    "\n",
+    "\n",
+    "inventory = initialize_inventory(products)\n",
+    "print(inventory)\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 119,
+   "id": "9719fecf-5d93-4823-98f3-2404845605e9",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Do you want to order a product? (yes/no):  yes\n",
+      "Enter the product you want to order:  mug\n",
+      "Do you want to order a product? (yes/no):  yes\n",
+      "Enter the product you want to order:  hat\n",
+      "Do you want to order a product? (yes/no):  no\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'hat', 'mug'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "#2 Define a function named get_customer_orders that takes no parameters. Inside the function, implement the code for prompting the user to enter the product names using a loop. \n",
+    "#The function should return the customer_orders set.\n",
+    "\n",
+    "def get_customer_orders():\n",
+    "    customer_orders = set()\n",
+    "    while True:\n",
+    "        order = input(\"Do you want to order a product? (yes/no): \")\n",
+    "        if order == \"yes\":\n",
+    "            product = input(\"Enter the product you want to order: \")\n",
+    "            customer_orders.add(product)\n",
+    "        elif order == \"no\":\n",
+    "            break\n",
+    "        else:\n",
+    "            print(\"Invalid input. Please answer with 'yes' or 'no'\")\n",
+    "        \n",
+    "    return customer_orders\n",
+    "\n",
+    "customer_orders = get_customer_orders()\n",
+    "print(customer_orders)\n",
+    "        "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 123,
+   "id": "2828a0b0-d991-4d12-abc8-bf0a0f7de17a",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'t-shirt': 5, 'mug': 5, 'hat': 5, 'book': 5, 'keychain': 5}\n",
+      "{'hat', 'mug'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "#3 Define a function named update_inventory that takes customer_orders and inventory as parameters. \n",
+    "#Inside the function, implement the code for updating the inventory dictionary based on the customer orders.\n",
+    "\n",
+    "def update_inventory(customer_orders, inventory):\n",
+    "    for product in customer_orders:\n",
+    "        if product in inventory:\n",
+    "            if inventory[product] > 0:\n",
+    "                inventory[product] -= 1\n",
+    "            elif product in inventory and inventory[product] <= 0:\n",
+    "                print(f\"There is not enough {product} on stock to fulfill the order!\")\n",
+    "\n",
+    "    return inventory\n",
+    "\n",
+    "print(inventory)\n",
+    "print(customer_orders)\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 125,
+   "id": "10f53296-bed3-4718-8b63-c9247dca9794",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "2\n",
+      "8%\n"
+     ]
+    }
+   ],
+   "source": [
+    "#4 Define a function named calculate_order_statistics that takes customer_orders and products as parameters. \n",
+    "#Inside the function, implement the code for calculating the order statistics (total products ordered, and percentage of unique products ordered). \n",
+    "#The function should return these values.\n",
+    "\n",
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    total_ordered = len(customer_orders)\n",
+    "    total_inventory = sum(inventory.values())\n",
+    "    percentage_ordered = (total_ordered / total_inventory) * 100\n",
+    "\n",
+    "    return total_ordered, percentage_ordered\n",
+    "\n",
+    "total_ordered, percentage_ordered = calculate_order_statistics(customer_orders, products)\n",
+    "\n",
+    "print(total_ordered)\n",
+    "print(f\"{round(percentage_ordered)}%\")\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 127,
+   "id": "4b615619-33ce-44e4-b00d-3d0465c44eae",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Order Statistics:\n",
+      "Total Products Ordered: 2\n",
+      "Percentage of Products Ordered: 8%\n"
+     ]
+    }
+   ],
+   "source": [
+    "#5 Define a function named print_order_statistics that takes order_statistics as a parameter. \n",
+    "#Inside the function, implement the code for printing the order statistics.\n",
+    "\n",
+    "def print_order_statistics(order_statistics):\n",
+    "    print(\"Order Statistics:\")\n",
+    "    print(f\"Total Products Ordered: {total_ordered}\")\n",
+    "    print(f\"Percentage of Products Ordered: {round(percentage_ordered)}%\")\n",
+    "    return\n",
+    "\n",
+    "print_order_statistics(order_statistics)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 129,
+   "id": "42bd3dcb-cff7-4d8b-abb5-998a2726f948",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Updated inventory after the order: {'t-shirt': 5, 'mug': 4, 'hat': 4, 'book': 5, 'keychain': 5}\n"
+     ]
+    }
+   ],
+   "source": [
+    "#Define a function named print_updated_inventory that takes inventory as a parameter. \n",
+    "#Inside the function, implement the code for printing the updated inventory.\n",
+    "\n",
+    "def print_updated_inventory(inventory):\n",
+    "    for product in customer_orders:\n",
+    "        if product in inventory and inventory[product] > 0:\n",
+    "            inventory[product] -= 1\n",
+    "        elif product in inventory and inventory[product] <= 0:\n",
+    "                print(f\"There is not enough {product} on stock to fulfill the order!\")\n",
+    "\n",
+    "    print(f\"Updated inventory after the order: {inventory}\")\n",
+    "    return\n",
+    "\n",
+    "print_updated_inventory(inventory)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 131,
+   "id": "5139693e-9edb-4db4-9f85-813f309d5bc2",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "How many t-shirts are in the inventory? 5\n",
+      "How many mugs are in the inventory? 6\n",
+      "How many hats are in the inventory? 8\n",
+      "How many books are in the inventory? 3\n",
+      "How many keychains are in the inventory? 7\n",
+      "Do you want to order a product? (yes/no):  4\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Invalid input. Please answer with 'yes' or 'no'\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Do you want to order a product? (yes/no):  yes\n",
+      "Enter the product you want to order:  hat\n",
+      "Do you want to order a product? (yes/no):  yes\n",
+      "Enter the product you want to order:  mug\n",
+      "Do you want to order a product? (yes/no):  no\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Order Statistics:\n",
+      "Total Products Ordered: 2\n",
+      "Percentage of Products Ordered: 8%\n",
+      "Updated inventory: {'t-shirt': 5, 'mug': 5, 'hat': 7, 'book': 3, 'keychain': 7}\n"
+     ]
+    }
+   ],
+   "source": [
+    "#7 Functions:\n",
+    "\n",
+    "products = ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n",
+    "\n",
+    "inventory = initialize_inventory(products)\n",
+    "\n",
+    "customer_orders = get_customer_orders()\n",
+    "\n",
+    "order_statistics = calculate_order_statistics(customer_orders, products)\n",
+    "\n",
+    "print_order_statistics(order_statistics)\n",
+    "\n",
+    "update_inventory(customer_orders, inventory)\n",
+    "\n",
+    "print(\"Updated inventory:\", inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "cf5c4c3b-0d5b-45bd-a650-6a2caa261af9",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
@@ -61,7 +354,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.12.7"
   }
  },
  "nbformat": 4,