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2. Given relation R(A,B,C,D,E,F), give (i) the key of R and (ii) the normal form of R if the FDs are (a) AB CD, C
2. Given relation R(A,B,C,D,E,F), give (i) the key of R and (ii) the normal form of R if the FDs are
(a) AB CD, C E, D F.
(b) A BCD, D EF.
(c) A BC, D EF.
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