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

AB

ABCD

CEA

BDA

1 Find all candidate keys in R and count the number of superkeys in R. Justify answer (i.e., include the main steps used for nding all candidate keys and counting the number of superkeys).

2 What is a minimal cover of ? Justify answer (i.e., include the main steps used for nding a minimal cover).