Can you please please please answer this question in details with explanation (Thank you!)

7 Recommendation System [1.5 pts] Suppose you are an employee in Netjx. You are given a set of ratings (from one star to ve stars) from users on many movies they have seen. Using this information, your job is implementing a. personalized rating predictor for a given user on unseen movies. That is, a rating predictor can be seen as a function f : L! ) >Uz,* + > EVER (4,i) EM i , k () is a hyper-parameter controlling the degree of penalization.) 10