The following code computes the intersection (the number of elements in common) of two arrays. It assumes that neither array has duplicates. It computes the intersection by sorting one array (array b) and then iterating through array "a" checking (via binary search) if each value is in b. What is its runtime? Note: the time complexity of merge sort of n elements is nlogn. int intersection(int[] a, int[] b) { mergesort(b); int intersect = 0; for (int x a) { if (binarySearch (b, x) >= 0) { } intersect++; } } return intersect;