Can you help me with this JAVA question?

Question 4 (1 point) In this situation, an interface called Buffer has been defined, and a class called MyBuffer implements the Buffer interface. Which of the following statements is NOT legal. O MyBuffer buf new MyBuffer); O Buffer buf new MyBuffer(; O Buffer buf = new Buffer(); O All of these statements are fine. Save Question 5 (1 point) Which of the following is NOT true in Java? A class can only extend one other class. O A class can both extend a class and implement an interface. A class can implement only one interface. o A class that implements an interface must either be abstract or it must implement ALL the methods specified by the interface. Save