Can someone do these tasks in c++ please, im very confused. Thanks.

Task 3: Write a program that asks for the user for the number of students in the class. The program then calls a function named computeTotal, which uses the number of students as a parameter and calculates and display the sum of all grades in class. This function should also return the total to the main function. The program then calls a function named computeAverage. The number of students and the total grade should be used as a parameter for the computeAverage function. The function computes the average grade in the class, and returns the calculated average to the main program. The main program then displays the average grade. The average and the grade should show at least two decimal points