1) Identify the program lines that result in a compiler error. 2) Explain in each sentence what the cause of the compiler error is. 3) Identify the program lines that cause a runtime error. 4) Explain in each sentence what the cause of the runtime error is. Why does not a compiler error occur? 5) Identify the program lines (if any) that contain an explicit downcast. Also specify program lines that are incorrect according to 1 or 3. 6) Identify the program lines (if any) that contain an explicit upcast. Also specify program lines that are incorrect according to 1 or 3. 7) Identify the program lines (if any) that contain an implicit upcast. Also specify program lines that are incorrect according to 1 or 3.

public class A [ public void a() { System.out.println("a"); } public class B extends A public void b) System.out.println("b") public class C extends B public void cO System.out.println("c") public class ABCMain public static void main(String[] args) A a-new AO; B b: new B(); C c new CO; 02 03 04 05 06 07 08 09 18 a.a) b.a); c.a) a.bO; b.b); c.b); a.c); b.cO; c.co; 13 15 ? x-new B(); x.a) x.b); x.c 17 ((A)x).aO; ((B)x).bO ((C)x).cO