Consider the universal table D = {P, Q, R, S, T, U, V, W, X, Y, Z} with the following set of

Question

functional dependencies:
{P, R} -> {Q, T, U}
{T} -> {S}
{V, W} > {X, Z}
{X} -> {Y}
What is the primary key for D?
Decompose D into 2NF tables.
Decompose D into 3NF tables.