Convert merge in Assignment 3 into a subroutine. Write a main program to perform
Convert "merge" in Assignment 3 into a subroutine. Write a "main" program to perform mergesorting of a list of integers by calling "merge" repeatedly. For example, if the sorting program takes (6,5,9,1,7,0,-3,2) as input, it will produce a sorted list (-3,0,1,2,4,6,7,9).