Given the following definitions: public abstract class Manager extends Employee { ... } public class Executive extends Manager { ... } What kind of classes are Manager and Executive, respectively?

A subclass of an abstract class must provide concrete implementations for each of the parent class's abstract methods in order to be considered a subclass. What are your thoughts on this?

Given the following definitions: public abstract class Manager extends Employee {...} public class Executive extends Manager { ... } What, if anything, is wrong with the following code? public class hrSystem { } public void payRaise () { } Manager m = new Manager(); O Compiler error because there is no Manager constructor. Compiler error because Manager is abstract so an instance cannot be created. No problem. The code will compile without any errors. O Compiles fine but will generate a run-time error unless an Employee object is created first.

Modify and rewrite the Food class to an abstract class, so that no instance of Food class can be created