BI

Part 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. And also, write 2 Comments, each 200+ words on above topic. 

Part 2:

What are the privacy issues with data mining? Do you think they are substantiated? And also, write 2 Comments, each 200+ words on above topic.