In C# programming I have the following: Design and implement a program that asks the user to enter 3 quiz scores (out of 50), calculates and displays the average score and the average percentage as well as a letter grade. >= 90 is an A, between 80 and 90 is a B, between 70 and 80 is a C, below 70 is an F. The program should display an error message and allow the user to reenter any scores that are not whole numbers between 0 and 50.