Use the following relations to answer the questions below using relational calculus.

All questions must be answered with tuple relation calculus.

Branch

branchNo	street	city	postcode
B005	22 Deer Rd	London	SW1 4EW
B007	16 Argyll St	Aberdeen	AB2 3SU
B003	163 Main St	Glasgow	G11 9QX
B004	32 Manse Rd	Bristol	BS99 1NZ
B002	56 Clover Dr	London	NW10 6EU

Staff

staffNo	fName	lName	position	sex	DOB	salary	branchNo
SL21	John	White	Manager	M	1-Oct-45	30000	B005
SG37	Ann	Beech	Assistant	F	10-Nov-60	12000	B003
SG14	David	Ford	Supervisor	M	24-Mar-58	18000	B003
SA9	Mary	Howe	Assistant	F	19-Feb-70	9000	B007
SG5	Susan	Brand	Manager	F	3-Jun-40	24000	B003
SL41	Julie	Lee	Assistant	F	13-Jun-65	9000	B005

1. Give a relational calculus statement that returns first and last names of all staff and which city they work in.

2. Give a relational calculus statement that returns the first and last name of all the employees that work in Glasgow but isnt the Manager.

3. Give a relational calculus statement that returns the branchNo, street, and city of all branches that have no staff working at it.