Can you please help for database systems. Thank you.

The following tables form part of a database held in a relational DBMS: Hotel (hotelNo, hotelName, city) Room (roomNo, hotelNo, type, price) Booking (hotelNo, guestNo, dateFrom, dateTo, roomNo) Guest (guestNo, guestName, guestAddress) Where the following applies: Hotel contains hotel details and hotelNo is the primary key; Room contains room details for each hotel and (roomNo, hotelNo) forms the primary key; Booking contains details of the bookings and (hotelNo, guestNo, dateFrom) forms the primary key; Guest contains guest details and guestNo is the primary key. Identify the foreign keys in the schema. Explain how the entity and referential integrity rules apply to these relations (5pts) For the following exercises, use the Hotel schema defined in 4 above. Hotel (hotelNo, hotelName, city) Room (roomNo, hotelNo, type, price) Booking (hotelNo, guestNo, dateFrom, dateTo, roomNo) Guest (guestNo, guestName, guestAddress) Describe the relations that the following relational algebra operations would produce: 3. hotelNo (price 50 (Room)) (5pts) 4. Hotel.hotelNo Room.hotelNo(Hotel Room) (5pts) 5. hotelName (Hotel Hotel.hotelNo Room.hotelNo (price 50 (Room)) ) (5pts) 6. Guest (dateTo 1-Jan-2007 (Booking)) (5pts) 7. Hotel (Hotel.hotelNo Room.hotelNo (price 50 (Room)) ) (5pts)