using Java

8. Which of the following method signatures are valid overrides of the hairy() method in the Alpaca class? 01: import java.uti1."; 02: public class Alpaca \{ 03: protected ListcString) hairy(int p) ( return nu11; ) 04: \} (Choose all that apply) Listestring> hairy(int p) \{ refurn null; \} public List> hairy(int p ) (return null; ) public ListeCharSequence > hairy(int p) \{return null; \} private ListeString> hairy(int p) (return null;) public Object hairy(int p) \{ return nuli:) public ArrayListestring> hairy(int p) ( return null; \} 9. Which of the following statements about polymorphism are true? (Choose all that apply) An object may be cast to a subtype without an explicit cast. If the type of a method argument is an interfoce, then a reference variable that implements the interface may be passed to the method. A method that takes a parameter with type jaya. Iang. Object can be passed any variable. All cast exceptions can be detected at compile-time. By defining a final instance method in the superclass, you guarantee that the specific method will be called in the parent class at runtime: Polymorphism applies only to classes, not interlaces