function

[farisasri95]

at the beginning of every year, khalid will enter the performance evaluation marks. based on the marks, he will receive a raise of his previous year's salary. he wants a program that will read the performance marks, then calculate and display the amount of his annual raises for the next three years. if his performance marks is more than 81, the rates are, 5%, 6% and 7%. if his performance marks is between 60 and 81, the rates are 3%, 4% and 5%. if his performance marks is less than 60, the rates are 2% for three consecutive years.