Table below contains sample data for parts and for vendors who supply those parts. In discussing these data with users, we find that part numbers $($but not descriptions$)$

uniquely identify parts and that vendor names uniquely identify vendors.

a$)$ Draw a relational schema for PART SUPPLIER and show the functional dependencies.

b$)$ In what normal form is this relation?

c$)$ Develop a set of $3NF$ relations from PART SUPPLIER.