public class Symphony extends Attraction {
 // First, define instance variables:
 public int music, playing, conducting;
 // Define zero-parameter constructor:
 public Symphony () {music = 5; playing = 5; conducting = 5;}
 // Define one-parameter constructor:
 public Symphony (int m) {super (m);} 
 // Define three-parameter constructor: 
 public Symphony (int s, int a, int d) { 
  music = s; playing = a; conducting = d; 
 } 
 // Define four-parameter constructor:
 public Symphony (int s, int a, int d, int m) { 
  this (s, a, d);
  minutes = m;
 } 
 // Define rating:
 public int rating () {return music + playing + conducting;}
 // Define category:
 public String category () {return "Symphony";}
}