*Use the following description to answer the question, not just answer what is text mining but describe your text mining solution including choices of text preprocessing and data mining techniques.

1. Business applications: Suppose that you work for AT&T, which runs customer discussion groups on its website. There are active discussions happening simultaneously too many for the company to monitor them all.
   1. How can the company get a general understanding of what is being discussed, and how it changes from week to week? Please describe your text mining solution including choices of text preprocessing and data mining techniques (e.g., association rule, k-means, decision tree, etc.). [8 points]