Question $1$: $($a$)$ Recommendation systems can be used in multiple industries. Please provide $3$ examples $($besides retail$)$ where recommendation systems are utilized. $($b$)$ Choose one of the industries in part $($a$)$ and highlight how a recommendation system can be enhanced to do more than recommending a product or service.

Question $2$: Download the following article and summarize how recommendation systems are evaluated.

Article: Recommendation Systems: Principles, Methods, & Evaluation