Programming Homework Help

Having trouble writing this:(

Write a program thast does the following:

Prompts the user to input a numeric grade between 0 and 100.

Prompts the user to input a grade category( Ma=major, Mi=minor, Oth= other)

Continue to prompt user for grades and categories while the input for a grade is greater or equal to zero.

As user enters grades, accumulate each type. When the user quits, calculate the grade average based on the following:

Major grades are 70% of total average

Minor grades are 20% of total average

other grades are 10% of total average