Write a program in C#, to help instructors calculate grades for students. You first want to prompt instructors to enter the desired number of scores. This value is the size of your array (you can use an array of type int for this assignment). Then, use a loop to prompt the instructors to enter the scores (from 0 to 100). You must store each score in this array. Once the users have entered all scores, use a loop to calculate the grade for each student in the course and the corresponding letter grade. Output the final grade and corresponding letter grade. You may assume that the instructor enters each score, and that all scores are weighted the same. Make sure to run through your program a few times to ensure that it works properly.