a=d;a=c;b=d The following assignments are illegal: b=a;b=c;c=b Draw the class diagram to show relationship between A,B,C and D based on given legal and illegal assignments. Q4. Write the definition of classes and interfaces in the given diagram using following details: a) Interface shape has a method draw(). b) Override the method draw() in all subclasses. c) Define a non-abstract method fillColor() in Circle class. Q5. Arrange the following classes in a best possible inheritance hierarchy? Classes: Food, Vegetables, Fruits, Drinks, Grapes, Carrots, Pepsi, Orange, Apple