This Is a question of "Oracle Database Principles & Application" subject

+ Consider the Relation R(ABCDEF) with the following functional dependency(FDs) { AD, AB-E, BFE, CDF, E-C} (1) find all keys of R and identify the prime attributes. Write down all necessary steps. (2) explain why R is not in Third Normal Form(3NF). Is R in BCNF and why? (3) decompose R into relations in 3NF preserving all FDs