33. The following are all true except a. A 4NF relation is also 3NF b. A 4NF relation is also BCNF. C. A 3NF relation is also BCNF. d. A BCNF relation is also 3NF 34. Which decomposition preserves functional dependencies? a. 3NF but not 4NF b. BCNF but not 3NF. c. 4NF but not BCNF. d. All three preserve dependencies. 35. In which order the six subsets of [123] are visited by SE(1, new HashSet)? void SE(int k, HashSet S) visit(S); / do something with subset S for (intj-k; j