public class Team extends java.util.LinkedList { 
public void addPlayer（Player p） { 
add（p）； 
} 
public void compete（Team opponent） { /* more code here */ } 
} 
class Player { /* more code here */ } 
Which two are true？（）

10. public class SuperCaic { 
11. protected static int multiply（int a， int b） { return a * b； } 
12. } 
and： 
20. public class SubCalc extends SuperCalc { 
21. public static int multiply（int a， int b） { 
22. int c = super.multiply（a， b）； 
23. return c； 
24. } 
25. } 
and： 
30. SubCalc sc = new SubCalc（）； 
31. System.out.println（sc.multiply（3，4））； 
32. System.out.println（SubCalc.multiply（2，2））； 
What is the result？（）