Use the relational algebra and the following property management database to generate list for each problem.

Branch (Bno, Street, Area, City, Pcode, Tel_No, Fax_No)

Staff (Sno, FName, LName, Address, Tel_No, Position, Sex, DOB, Salary, NIN, Bno)

Property (Pno, Street, Area, City, Pcode, Type, Rooms, Rent, Ono, Sno, Bno)

Renter (Rno, Fname, Lname, Address, Tel_No, Pref_Type, Max_Rent)

Owner (Ono, Fname, LName, Address, Tel_No)

Viewing (Rno, Pno, Sno, Date, Comment)

1. A list of staff numbers who do not manage any property for rent.

2. A list of staff numbers who manage a property for rent.

3. A list of renter numbers who have not looked any property for rent.

4. A list of renter numbers who have looked a property for rent

5. A list of owner numbers who only have property with 3 bedrooms and located at Saratoga.