Done

src/Main.java

@@ -0,0 +1,61 @@
+public class Main {
+
+    // Task 1
+    public static int findDifference(int[] array) {
+        int max = array[0];
+        int min = array[0];
+
+        for (int num : array) {
+            if (num > max) {
+                max = num;
+            }
+            if (num < min) {
+                min = num;
+            }
+        }
+
+        return max - min;
+    }
+
+    // Task 2
+    public static void findSmallestAndSecondSmallest(int[] array) {
+        int min1 = Integer.MAX_VALUE;
+        int min2 = Integer.MAX_VALUE;
+
+        for (int num : array) {
+            if (num < min1) {
+                min2 = min1;
+                min1 = num;
+            } else if (num < min2 && num != min1) {
+                min2 = num;
+            }
+        }
+
+        System.out.println("Smallest element: " + min1);
+        System.out.println("Second smallest element: " + min2);
+    }
+
+    // Task 3
+    public static double calculateExpression(double x, double y) {
+        return (x * x) + (2 * x * y) + (y * y);
+    }
+
+    public static void main(String[] args) {
+        // Example usage for Task 1
+        int[] array1 = {3, 7, 1, 9, 2};
+        System.out.println("Difference: " + findDifference(array1));
+
+        // Example usage for Task 2
+        int[] array2 = {5, 8, 2, 4, 1, 7};
+        findSmallestAndSecondSmallest(array2);
+
+        // Example usage for Task 3
+        double x = 3.0;
+        double y = 4.0;
+        System.out.println("Result of expression: " + calculateExpression(x, y));
+    }
+}
+
+
+
+