1. The following program produces 4 lines of output. Write the output below, as it would appear on the console.

import java.util.*;

public class ReferenceMystery{

public static void main(String [] args){

int y=1;

int x=3;

int [] a = new int[4];

mystery(a,y,x);

System.out.println(x+" "+y+" "+Arrays.toString(a));

x=y-1;

mystery(a,y,x);

System.out.println(x+" "+y+" "+Arrays.toString(a));

}

public static void mystery(int[] a, int x, int y){

if (x

x++

a[x] = 17;

}

else{

a[y} = 17;

}

System.out.println(x+" "+y+" "+Arrays.toString(a));

}

}