diff --git a/product.pdf b/product.pdf
new file mode 100644
index 0000000..0ff2c54
Binary files /dev/null and b/product.pdf differ
diff --git a/ref.pdf b/ref.pdf
new file mode 100644
index 0000000..a984118
Binary files /dev/null and b/ref.pdf differ
diff --git a/rref1.pdf b/rref1.pdf
new file mode 100644
index 0000000..47fc620
Binary files /dev/null and b/rref1.pdf differ