SQL Problem

Can anyone please solve the following problem......

Consider 3 tables
HOTEL(Hotel_No,Name,Address)
ROOM(Room_No,Hotel_No,Type,Charge)
BOOKING(Hotel_No,Guest_No,Date_From,Date_To,Room_No)
GUEST(Guest_No,Name,Address)

Note:Underlined fields denote the primary key of the respective table

Queries
1)List the details of all rooms at Taj hotel, including the name of the guest staying in the room, if the room is occupied.
2)What is total income from bookings for the Taj hotel today?
3)List the unoccupied rooms of the Taj hotel
4)What is lost income from unoccupied rooms of Taj hotel?
5)What is lost income from unoccupied rooms at each hotel today?
6)What is most commonly booked room type for each hotel in Delhi?