Question: Consider the relation schema R={A, B, C, D, E} and the following set of Functional Dependencies (FDs):AB AB CD BC D DE A a. What

Consider the relation schema R={A, B, C, D, E} and the following set of Functional Dependencies (FDs):AB

AB CD

BC D

DE A

a. What are the (candidate) keys of R? Justify your answer (i.e., show the main steps and your working used for finding all the keys).

b.What is a minimal cover of ? Justify your answer (i.e., show the main steps and your working used for finding a minimal cover).

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