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[15 Points] Consider the relation stocks (B,O,I,S,Q,D) with the FD's: SD, IB,ISQ, and BQ, where
you can think of B as broker, O as office (of the broker), I as investor, S as stock, Q as quantity (of
the stocks owned by the investor), and D as dividend (of the stock). (a). Find all the keys of
Stocks. (b). Find a minimal basis for the FD's, if not already minimal. (c). Use the synthesis
algorithm to find a lossless-join and dependency-preserving decomposition of Stocks into 3NF
relations. Are any of the resulting relations not in BCNF ?

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