Дано:
1. public class Electronic implements Device {
2. public void doIt() {
3. }
4. }
5.
6. abstract class Phone1 extends Electronic {
7. }
8.
9. abstract class Phone2 extends Electronic {
10. public void doIt(int x) {
11. }
12. }
13.
14. class Phone3 extends Electronic implements Device {
15. public void doStuff() {
16. }
17. }
18.
19.
20. interface Device {
21. public void doIt();
22. }
Каков результат (выберите все подходящие):
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