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Refer to chapter 14 from the attached book and answer the below question in 300 words

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Refer to chapter 14 from the attached book and answer the below question in 300 words.

Q) Discuss insertion, deletion, and modification anomalies. Why are they considered bad? Illustrate with examples. 

Refer to chapter 15 from the attached book and answer the below question in 300 words.

Q) What is meant by the closure of a set of functional dependencies? Illustrate with an example.