utput of the following code? Stack s new Stack0 s .push (7); s.push (12); System.out.println(s.pop))i System.out.println(s.peek)): s.push (9); s.push (5); s.push (3); System.out.println(s.pop)); System.out.println (s.isEmpty)) System.out.println(s.size ()): System.out.println (s.peek()); s.push (8) System.out.printin(s.pop ())i System.out.printin(s.pop ()); System.out.println(s.peek))