A given relation

R (A, B, C, D, E, F, G, H, I, J, K, L, M, N)

has these functional dependencys:

A-> B, C, D, F, J

G -> H, I

A, G -> M

M -> N

D -> E

J -> K, L

Which is the key for R? Describe and ilustrate step ky step the process of normalizing the relation to 1NF, 2NF, 3NF and BCNF.