Please answer to the below two questions using relational algebra with commands such as Select, Project, Join, etc. I do not want you to use SQL. Thanks!

Rental Database

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, Sno, Pno, Date, Comment)

1. A renter viewing list (Rno, Fname, Lname) of renters who have not looked a property for rent with 4 bedrooms.

2. A report of number of property managed by each staff that contains (Sno, FName, LName, number of property managed)