Solve part b only

b) Write test cases for the following code? Name the tyne of testina Q no 3: (5) Draw class diagram for the front office system in a 5-star hotel described below. Front office of any hotel is responsible for all rooms' reservations, room allocation and final settlement of bills. Any company or person can reserve rooms for their future stay. They have to indicate from what date to what they need the room. They also have to indicate how many rooms are required. Sometimes the reservations could be cancelled or dates or number of rooms changed. For reservation, cancelled or modification of rooms, customer receives an acknowledgement from the hotel