Suppose we have relation R(A, B, C, D, E), with some set of FD's, and we wish to project those FD's onto relation S(A, B, C). Give the FD's that hold in S if the FD's for R are: a) AB rightarrow DE, C rightarrow E, D rightarrow C, and E rightarrow A. c) AB rightarrow D, AC rightarrow E, BC rightarrow D, D rightarrow A, and E rightarrow B