Consider a relation R with five attr?butes A, B, C, D, E. You are given the following dependences: 1. BC- D Is{(ABCE)j a candidate key of this relation? If not, is (ABC)j? Justify your answer Answer: 2. Consider the relation F with six attributes E.R,I,D,A,Y with the following dependences RY ->F, FY >A, and a) List all keys for F and justify your answer Answer: b) Identify prime and non-prim Answer: e attributes and justify your answer c) Classify each functional dependency and justify your answer Answer: d) Determine normal form for the relation F and justify your