a- What is the output of implementing the class Entity2 in the following code class Entity1 { public Entity1() { } System.out.println("Entity1's no-arg constructor is invoked"); } class Entity3 extends Entity1 { } public class Entity2 { } public static void main(String[] args) { } Entity3 thing = new Entitty3(); - Is there a compiling problem in the following code, what is it? Class Entity1 { public Entity1(int x) { } Class Entity2 extends Entity1 { public Entity2() { } public class Entity3 { public static void main(String[] args) { } Entity2 thing = new Entity2();