This is for C#

Semester Grade

Write a program that uses the numeric scores on three exams to calculate and display a letter grade.

The lowest of the three scores is dropped. The letter grade is assigned using the following grading scale:

$90-100($A$),80-89($B$),70-79($C$),60-69($D$),$ below $60(F).$

Your form will have three custom methods: one void method, and two value$-$returning methods.

A value$-$returning method to calculate the numeric average of the two highest scores.

The method has three parameters, one for each score. It returns the average.

A value$-$returning method to translate the numeric average to a letter grade. This

method has one parameter, which is the numeric average. The function returns the

letter grade.

A void method to display the name and letter grade on the form. This method has two

parameters, one for the student name and one for the letter grade.

Input validation is not required.

Do not use class level variables $($fields$)$ in your solution.

Suggestion: Do not use existing variable names as parameter names.

Suggestion: First create a solution that works using only the button Click event procedure. Then,

modularize the event procedure using existing statements by adding methods and testing after

each new method.