Question: Let R(A,B,C,D) be a relation schema with the following set of FD's: F = {AB C, C D, D A}. (a). Find

Let R(A,B,C,D) be a relation schema with the following set of FD's:
F = {AB → C, C → D, D → A}.
(a). Find all the keys of R.
(b). Find all the super keys of R that are not keys.

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