Question: 6. [20 points] Consider a relational schema R (A, B, C, D, E, F) where the set F of functional dependencies holds on R and

6. [20 points] Consider a relational schema R (A, B, C, D, E, F) where the set F of functional dependencies holds on R and F= {AB, C A, CD E, D F). (a) Identify all candidate key(s) of R. (b) Indicate all BCNF violations in E (c) Decompose R, if necessary, into a collection of schemas that are in BCNF. (d) Is your decomposition in (c) dependency preserving? Explain why

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