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Question 1) Why are the original/raw data not readily usable by analytics tasks?

Question 1) Why are the original/raw data not readily usable by analytics tasks? What are the main data preprocessing steps? List and explain their importance in analytics.200 words, citations and references plz no plagiarism.Question 2) What are the privacy issues with data mining? Do you think they are substantiated?200 words, citations and references plz no plagiarism.
Requirements: .doc file