Consider the following interface and $($partial$)$ class definitions in Java:Which of the following statements are true? $($May be more than one, indicate all that apply.$)$

Class Clock must provide method implementations for all four methods declared in AMPMClock

Class Clock$1$L implements interface AMPMClock

The method hour$()$ must be implemented in one of class Clock or class clock$1$L but not both

The following is a valid declaration and instantiation of variable myclock:

AMPMClock myClock $=$ new Clock$1$L $()$;