Which of the following describes the main purpose of a model?

To add value to a study
To solve a particular problem
To change the criteria considered
To demonstrate how something works

Write a program that reads a set of floating-point values. ask the user to enter the values, then print • the average of the values. • the smallest of the values. • the largest of the values. • the range, that is the difference between the smallest and largest. of course, you may only prompt for the values once.