6. If Class2 is a subclass of Class1 and Class3 is a subclass of Class2, answer (points 10) the following questions in terms of syntax error or run-time error. Class1 c1=new Class1(); Class2 c2= new Class2(); Class3 c3 new Class30; (i) c1=c2; (i) c2-c3; (iii) c2 = (Class2) c1; (iv) C1-C3; (v) c3 (Class3) c2; IV