The first 2 questions use the schema R = (A,B,C,D,E) and the set F of functional dependencies:
A -> B
C -> D
BD -> E
1. Which of the following is in F+ (the set of functional dependencies logically implied by F)?
(a) A ->E
(b) B -> A
(c) E -> A
(d) AC -> E
(e) AD -> E
2. Which of the following are candidate keys?
(a) AB
(b) CD
(c) BD
(d) AC
(e) E
(f) AE