Assignment: You are developing an e$-$commerce platform where promotions play a crucial role in attracting customers. A function called double calculateDiscountedPrice$($double originalPrice, double discountRate$)$ has been implemented, but before deploying this feature, you need to ensure its accuracy by writing a driver program.

Fill in the main function in the assignment below to test for the following cases:

Test Case $1$: Check if a $50\%$ discount is correctly applied to a product priced at

$50$ product price unchanged.

Test Case $3$: Ensure that a $100\%$ discount on a

$75$ price.

Your output should be as follows:

Test Case $1$: Price after a $50\%$ discount on $$100$ is $$50$

Test Case $2$: Price after a $0\%$ discount on $$50$ is $$50$

Test Case $3$: Price after a $100\%$ discount on $$100$ is $$0$

Test Case $4$: Price after a $25\%$ discount on $$75$ is $$56\mathrm{.}25$