Implement using Java, a simple hotel reservation system with the following 4 classes: class Room , class SingleRoom, class DoubleRoom and class Hotel, Your implementation should ensure encapsulation.

Class Room is abstract each room has: o An integer variable roomNumber. o A boolean variable reserved representing if the room is reserved or not. o A constructor that receives the roomNumber for initialization of the roomNumber instance variable o Accessor method for instance variables. o Mutator method for reserved o An abstract method : public abstract double getPrice( ) Class SingleRoom which extends Room such that: o each single room has a constructor that receives the roomNumber for initialization of the roomNumber instance variable o Implements method getPrice( ) defined in class Room by returning 200.

Class DoubleRoom which extends Room such that: o Each double room has a constructor that receives the roomNumber for initialization of the roomNumber instance variable o Implements method getPrice( ) defined in class Room by returning 300.

Class Hotel, each hotel has: o A String variable name o A variable rooms of type: Room [ ] representing the hotel rooms o A constructor that receives the name , rooms for initialization of instance variables o Accessor methods for instance variables. o A method public boolean isFull( ) which returns true if all the hotel rooms are reserved, otherwise returns false.