多选题 Given:
2. public class Jail {
3. private int x=4;
4. public static void main (String[] args) {
5. protected int x=6;
6. new Jail() .new Cell() .slam();
7. }
8. class Cell {
9. void slam() {System.out.println ("throw away key" + x); }
10. }
11. }
Which are true? (Choose all that apply.)