Question

Consider the universal relation R = {A, B, C, D, E, F, G, H, I} and the set of
functional dependencies F = { {A, B} -> {C}, {A} -> {D, E}, {B} -> {F}, {F} ->
{G, H}, {D} -> {I, J} }. What is the key for R? Decompose R into 2NF, then 3NF
relations.

Repeat above exercise for the following different set of functional dependencies
G = { {A, B} -> {C}, {B, D} -> {E, F}, {A, D} -> {G, H}, {A} -> {I}, {H} -> {J} }.