多选题 Given:
2. class Weed {
3. protected static String s = "";
4. final void grow() {s += "grow "; }
5. static final void growFast() {s += "fast "; }
6. }
7. public class Thistle extends Weed {
8. void grow() {s += "t-grow "; }
9. void growFast() {s+= "t-fast "; }
10. }
Which are the FEWEST change(s) required for this code to compile? (Choose all that apply.)