Consider relation R(A, B, C, D, E). Assume that R has the following set S of functional dependencies (FDs) S = {AE D, AC B, BE, D A, EC D}. We project the relation R to obtain R(A, C, E) = TA,C,E(R). a. What are the keys of R. If there is more than one key, find all of them. b. Compute the FDs of R. Show the minimal basis of these FDs. c. What are the keys of R. If there is more than one key, find all of them.