15.  int x = 0;
      int y = 0;
      cin >> x;
      switch(x)
    	{
		  case 1 :  y = 2;
				break;
		  case 4 :  y = 5;
				break;
		  default :  y = 7;
	    }
     cout << y;

     If the user enters 5 for variable x, what is the output?

(a)	0
(b)	2
(c)	5
(d)	7