Relational Detabases: Functional Dependency Problem:

1. Consider the following relation r below. Which of the following FDs does r satisfy? 2. Let F-(AB C, B D.CD E.CE GII,G A). Using Armstrong's axioms, give proofs for the following: 3. Prove or disprove the following inference rules for a relation r(R) with W. X, Y, and Z subsets of attributes of R. b, XY Z and Z X imply Z Y. C. X Y and Y Z imply X YZ