多选题 Given:
1. interface Syrupable {
2. void getSugary();
3. }
4. abstract class Pancake implements Syrupable { }
5.
6. class BlueBerryPancake implements Pancake {
7. public void getSugary() { ; }
8. }
9. class SourdoughBlueBerryPancake extends BlueBerryPancake {
10. void getSugary(int s) { ; }
11. }
Which are true? (Choose all that apply.)