consider the following interface and class declarations. an 8-line code segment reads as follows. line 1: public interface student. line 2: open brace, forward slash, asterisk, implementation not shown, asterisk, forward slash, close brace. line 3: blank. line 4: public class athlete. line 5: open brace, forward slash, asterisk, implementation not shown, asterisk, forward slash, close brace. line 6: blank. line 7: public class tennis player extends athlete implements student. line 8: open brace, forward slash, asterisk, implementation not shown, asterisk, forward slash, close brace. assume that each class has a zero-parameter constructor. which of the following is not a valid declaration?
