9) [16 pts] Answer the following questions using the figure and the code below. e) [2 pts each] State the execution result (compile error, runtime error - ClassCastException, or no problem for the following statements and explain the reason for the error cases. Each case is independent from each other. Suppose the method amethod is defined in the Class4. i) obj.aMethod(); d) [1 pt] Is obj2 instanceof Interface1? True False b) $[1 \mathrm{pt} ]$ Is obj3 instanceof Interface1? True False c) [1 pt] Is obj4 instanceof Interface3? True False a) [1 pt] Is obji instanceof Interface2? True False Class4 Interfacel obj1 = new Class(); Abstracti obj2 = new Class1(); Object obj3 = new class2(); Class3 obj4 = new Class4(); ii) Interface3 obj5 = obj2; iii) ((Class3)obj3). aMethod(); iv) $(Class 4) \operatorname{obj} 4) \cdot a Method ;$ f) [4 pts] Suppose that method "void $\mathrm{m} 20\{U} ;{ }^{\prime \prime} $ is in Abstract. Which classes have to implement it? CS.VS.922 - 9) [16 pts] Answer the following questions using the figure and the code below. e) [2 pts each] State the execution result (compile error, runtime error - ClassCastException, or no problem for the following statements and explain the reason for the error cases. Each case is independent from each other. Suppose the method amethod is defined in the Class4. i) obj.aMethod(); d) [1 pt] Is obj2 instanceof Interface1? True False b) $[1 \mathrm{pt} ]$ Is obj3 instanceof Interface1? True False c) [1 pt] Is obj4 instanceof Interface3? True False a) [1 pt] Is obji instanceof Interface2? True False Class4 Interfacel obj1 = new Class(); Abstracti obj2 = new Class1(); Object obj3 = new class2(); Class3 obj4 = new Class4(); ii) Interface3 obj5 = obj2; iii) ((Class3)obj3). aMethod(); iv) $(Class 4) \operatorname{obj} 4) \cdot a Method ;$ f) [4 pts] Suppose that method "void $\mathrm{m} 20\{U} ;{ }^{\prime \prime} $ is in Abstract. Which classes have to implement it? CS.VS.922