Which statements describe the sun? check all that apply. it is the center of the solar system. it is made up mostly of gases, not solids. it is ancient, at over 10 billion years old. it is the most massive object in the solar system. it is composed mostly of oxygen and nitrogen.

Write a program that asks the user to enter the name of an input file. if the file does not exist, the program should prompt the user to enter the file name again. if the user types quit in any uppercase/lowercase combinations, then the program should exit without any further output.