Your task is to model USyd's University Village. The University Village has the following rooms:

• Single (40 rooms)
• Twin (20 rooms)
• Double (15 rooms)
• Family (10 rooms)

Each room has its own room number. The availability of each room should also be managed. Furthermore, the daily price for each room is set as:

• Single ($62)
• Twin/Double ($90)
• Family ($120)