NM DO UN Given: 1 class Testo 2 int x; Testoby updateObject() { (X) x=900; return obj; } int receiveObject (TestObj obj) { x=100; 10 return x; 11 > 12 public String toString() { 13 return "Answer=" + x; 14 > 15) 16 class TestRetObject 17 public static void main(String[] args) { 18 TestObj obj= new TestObj(); 19 obj.updateObject(); 20 System.out.println(obj); 21 obj.receiveObject (obj): 22 System.out.println (obj); 23 GON NNNN (a) Which line number shows calling a method bypassing an object? [2 marks] (b) Which line number shows calling a method that returns an object? [2 marks] (c) Write a statement in (x) to complete method updateObject(). [2 marks] (d) What will be printed by line 20 and 22 if toString() method line 12-14 are commented? In maril