Please implement a class, ConferenceRoomList, that functions as a list, indexed by roomNumber, of Reservations associated with individual conference rooms. You are provided with the Reservation class, which describes simply objects composed of only a contactPerson and the numberOfPeople attending the event.

The ConferenceRoomList class should have the following properties:

• It should model a fixed number of conference roomss, numbered 0 through some maximum numberOfRooms. This size should be fixed when the ConferenceRoomList is initialized.
  
  
• It should be possible to makeAReservation. This associates a Reservation object with a particular roomNumber. Conference Rooms are numbered 0 through numberOfRooms-1. Making a Reservation for a room should destroy any prior association between a Reservation and the same room, if any.
  
  
• It should be possible to getAListOfAllContacts. In other words, a ConferenceRoomList, should be able to return (not print) a nicely formatted list of all people listed as contactPerson for a room Reservation.

It is possible, of course, that the user will enter an InvalidRoomNumber. Should this occur, the affected method should return nothing. It should instead handle it using the typical Java mechanism for informing the user of the problem. You are not responsible for other error conditions.