Merge Sort code is not working and showing exception

Question

public static void Merge(int[] arr,int p,int q,int r ) 
{
    int n1 = q-p;
    int n2 = r-q;
    int[] L=new int[n1];
    int[] R = new int[r-n2];

    for (int i =         


        

Answer 1

You array L is declared of size q-p, which are both 0