... {(a,2,3,4 ,5) , (2,a,3 ,5, 5)}(c) {(a,2,3,4 ,5) , (2,a,3 ,5, 5), (a,2,3,4,6)}(d) {(a,2,3,4 ,5) , (2,a,3,4 ,5) , (a,2,3,6 ,5) }(e) {(a,2,3,4 ,5) , (2,a,3,7 ,5) , (a,2,3,4,6)}(f) {(a,2,3,4 ,5) , (2,a,3,4 ,5) , (a,2,3,6 ,5) , ... dependency theory and its use in database design include [3, 38,436, 443, 656 ]. Good survey articles on the topic include [663, 355 ].FDs were introduced in [ 156 ], along with the concept of 3NF, ... dependencies hold.1. Is R in BCNF?2. Is R in 4NF?3. Is R in 5NF?4. Is S in BCNF? 5. Is S in 4NF?6. Is S in 5NF?Exercise 15. 14 Let us say that an FD X → Y is simple if Y is a single attribute.1....