Application 3.

Defining 20 student grades entered from the keyboard in the Notes series;

a) The sum and average of these grades, b) The program that prints the grades greater than 50 on the screen,

c) finds the number of grades less than 50, d) gets the sum of the 50 grades,

e) searches for a note entered from the keyboard in the array and finds how many.

Write in C++ by defining and calling functions for stylish? (So it will be defined separately for each option and called from the main block)