public class Mergesort { static int data[] = {15,45,32,12,68,653,34,21}; public static void main(String[] args) { // TODO Auto-generated method stub mergeSort(data, 0, data.length-1); printdata(); } private static void printdata() { for (int i = 0; i < data.length; i++) { System.out.print(data[i] + " "); } } private static void mergeSort(int[] data, int p, int r) { if (p < r) { int q = (p + r) /..