in c++ please

5) Write a complete program that reads in a letter grade from the keyboard and outputs the appropriate range for that grade. It should work for upper or lower case grades. (4pts) Grade Grade Range 90 - 100 80 - 89 70 - 79 Range 60 - 69 50 - 59 C Example Enter a letter grade: a Grade range is 90 - 100 Enter a letter grade: B Grade range is 80 - 89