多选题 Given:
1. import java.util.*;
2. public class MyPancake implements Pancake {
3. public static void main(String[] args) {
4. List＜String＞ x=new ArrayList＜String＞();
5. x.add("3"); x.add ("7"); x.add ("5");
6. List＜String＞ y=new MyPancake() .doStuff(x);
7. y.add ("i");
8. System.out.println (x);
9. }
10. List＜String＞ doStuff(List＜String＞ z) {
11. z.add("9");
12. return z;
13. }
14. }
15. interface Pancake {
16. List＜String＞ doStuff(List＜String＞ s);
17. }
What is the most likely result?