Question: 1 . Consider a relation R with five attributes ABCDE. You are given the following dependencies: A - > D; DE - > C; CB

1. Consider a relation R with five attributes ABCDE. You are given the following dependencies: A -> D; DE -> C; CB -> A.
1. For each FD $X \rightarrow Y$, compute the closure $X^+$
2. List all keys in R.
3. Is R in 3NF? Explain.
4. Is R in BCNF? Explain.

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