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1)Consider a relation with schema R(A, B, C, D) and FDs AB ? C, C ? D, and D ? A. b) What are the

1)Consider a relation with schema R(A, B, C, D) and FDs AB ? C, C ? D, and D ? A.

b) What are the keys of R? c) What are the superkeys for R that are not keys? d) Is R in 2NF? Why or why not? E) Is R in 3NF why or why not? F) Is R in BCNF? Why or why not?

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