Design a Ship class that the following members:

$$ A field for the name of the ship $($a string$).$

$$ A field for the year that the ship was built $($a string$).$

$$ A constructor and appropriate accessor and mutators.

$$ A toString method that displays the ships name and the year it was built.

Design a CruiseShip class that extends the Ship class. The CruiseShip class should have the following members:

$$ A field for the maximum number of passengers $($an int$).$

$$ A constructor and appropriate accessors and mutators.

$$ A toString method that overrides the toString method in the base class. The CruiseShip class's toString method should display only the ship$$s name and the maximum number of passengers.

Design a CargoShip class that extends the Ship class. The CargoShip class should have the following members:

$$ field for the cargo capacity in tonnage $($an int$).$

$$ constructor and appropriate accessors and mutators.

$$ toString method that overrides the toString method in the base class. The CargoShip class's toString method should display only the ship$$s name and the ship's cargo capacity,