Code in java:

6.(10 pts) Explain why the following class hierarchy is not reasonable: DefenseDepartment o General Private 7.(10 pts) Give at least one example of a reasonable field for each of the following classes in the following class hierarchy. Be sure that the field is at the right level in the hierarchy. Vehicle o Car o Airplane Passenger Fighter Bomber o SpaceShip 6.(10 pts) Explain why the following class hierarchy is not reasonable: DefenseDepartment o General Private 7.(10 pts) Give at least one example of a reasonable field for each of the following classes in the following class hierarchy. Be sure that the field is at the right level in the hierarchy. Vehicle o Car o Airplane Passenger Fighter Bomber o SpaceShip