Consider a relation R(A, B, C, D, E, F), with FDs AB → C , BC → D, D → E, BE → F and DF → C. 1. Is R in BCNF? Explain why or why not. 2. Find the closure of the following: 1. (A, B) 2. (B, D) 3. (D, F) 3. List one superkey of R that is not a (minimal) key

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