Create a test program to test this MergeSort Program: package ArraySplit;   import java.util.Arrays;   public class ArraySplit { public static void mergeSort(int[] a, int n) { if (n < 2) { return; } int mid = n / 2; int[] l = new int[mid]; int[] r = new int[n - mid];   for (int i = 0; i < mid; i++) { l[i] = a[i]; } for (int i = mid; i < n; i++) { r[i - mid] = a[i]; } mergeSort(l, mid); mergeSort(r, n - mid);   merge(a, l, r, mid, n - mid); }   public static void merge(int[] a, int[] l, int[] r, int left, int right) {   int i = 0, j = 0, k = 0; while (i < left && j < right) { if (l[i] <= r[j]) { a[k++] = l[i++]; } else { a[k++] = r[j++]; } } while (i < left) { a[k++] = l[i++]; } while (j < right) { a[k++] = r[j++]; } } }

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Merge sort

Merge Sort recursively sorts a given collection of numbers or elements by using the divide and conquer strategy in less time. It is one of the most used algorithms, with the worst-case time complexity of O (n log n). It was invented by John Von Neumann. The algorithm continuously divides an array into sub-arrays until each sub-array consists of a single element. It then merges those sub-arrays to produce a sorted array.