Can you solve this java problem with tracing, explain each step thank you.

15. (a) 11 (b) 3 (c) 12 (d) None of the above public class Main { public static void main(String args[]) { Test t1 = new Test (5 , 7); Test t2 = new Test (1 , 2); t1 = t2 ; t1.set All (3 , 8); System.out.println (t2.x + t2.y); class Test { public int x, y; public void set All (int x, int y) { this.x = x; this.y = y; public Test (int n, int y) { this.y = y; this.x = x