RELATIONAL ALGEBRA/DATABASE HELP THANKS

1. Answer each question with yeso or a number: Assume we have two relations R(A,B,C) and S(B,C,D). All four attributes ( A,B,C and D) are integer attributes. Assume that Relation R contains the following tuples: (1,2,2), (2,3,1), and (1,3,4). Assume that Relation S contains the following tuples (2,2,2),(3,1,1), (3,4,1), and (1,3,4). a) Is (A) a super-key for R? Answer (yeso): b) Is (A,B,C) a super-key for R ? Answer (yeso): c) Is (B,C) a candidate-key for R? Answer (yeso): d) What is the maximum number of super-keys that a relation with three attributes can have? Answer (a number): e) How many tuples are in the result of the Cartesian-product between R and S? Answer (a number): f) How many tuples are in the result of the natural join between R and S ? Answer (a number)