For each of the following relation schemas and sets FD's:

i)Indicate all the 3NF violations ii) Decompose the relations, as necessary, into collections of relations that are in 3NF. a) R(a, b, c, d) with FD's AB -> C, C -> D, and D -> A b) R(a, b, c, d) with FD's B -> C, and B -> D C) R(a, b, c, d) with FD's AB -> C, BC -> D, CD -> A, and AD -> B