Could you guys please help me with C++?

Grade Curving: Write a program that outputs a student's grade after computing a curve. The program will take as input a student's grade and the curve that will be added to the grade. The program will also output the letter grade obtained by the student. See some examples below: Enter a student's grade (0-160): 76 Enter a curving percentage (0 - 20): 14 Curving the student's grade by 14% The new grade is: 86.64 Final letter grade: 8 Enter a student's grade (0 - 100): 39 Enter a curving percentage (0 - 20): 20 Curving the student's grade by 20% The new grade is: 46.8 Final letter grade: F Ascending Order: Write a program that inputs three integers from the keyboard and prints them in ascending order. See some examples below: Number 1: 3 Number 2: 5 Number 3: 1 Order 1 3 5 Number 1: 10 Number 2: 2 Number 3: 13 Order 2 10 13 Toll Payment: Create a program that takes as an input an integer that represents the number of miles driven by an user. The program should ou