write the code in c sharp from given picture

give the ans in 20 mints

1) Write a program to get 3 marks from the user in your main function 2) Write a function that compare these marks and return the highest mark 3) Write a function to return the average of 3 inputs marks. 4) Write a function get the average as input and indicate the grade and grade point of that average! 5) Call the functions you created in your main to see the proper output Output: " you entered 50, 60, 70 and your grade is C- and your grade point is 1.7