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Need Explanations for the correct answer(Not just copy and pasted shortcut solutions from the internet) Exercise 19.2 Consider a relation R with five attributes ABCDE.

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Need Explanations for the correct answer(Not just copy and pasted shortcut solutions from the internet)

Exercise 19.2 Consider a relation R with five attributes ABCDE. You are given the following dependencies: A B, BC E, and ED A. 1. List all keys for R. 2. Is R in 3NF? 3. Is R in BCNF

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