Room$--------------------$ number: int$-$ length: double$-$ width: double$-$ chairs: Chair$[]-------------------+$ Room$($number: int, length: double, width: double, chairs: Chair$[])+$ getNumber$()$: int$+$ setNumber$($number: int$)$: void$+$ getLength$()$: double$+$ setLength$($length: double$)$: void$+$ getWidth$()$: double$+$ setWidth$($width: double$)$: void$+$ getChairs$()$: Chair$[]+$ setChairs$($chairs: Chair$[])$: void$+$ displayRoomInfo$()$: void