b. Consider a relation R with five attributes ABCDE. You are given the following dependencies: AB,BCE, and EDA. State the strongest normal form that the relation is in. ( )1NF ( N 2NF1)3NF ( )BCNF c. Consider a relation R(A,B,C,D,E) with functional dependencies: DC,CEA,DA,AED. Which of the following is a key? ()BCE()AD()A()CDE d. Let relation R(A,B,C,D,E) satisfy the following functional dependencies: ABC,BCD,CDE,DEA,AEB. Which of the following FDs is also guaranteed to be satisfied by R? ( ) BCA ()ADB ( ) ACB ( ) AC