Question: Please answer with explanation 7. Suppose we have a rating matrix R of U x I with U users and I movies. We use matrix

Please answer with explanation 7. Suppose we have a rating matrix

Please answer with explanation

7. Suppose we have a rating matrix R of U x I with U users and I movies. We use matrix factorization to decompose the rating matrix into R=PQ", where P is U x k and Q is I x k. What should be the order of magnitude of k compared to U or I? Suppose that one of the movies is Rear Window. Describe a protocol using Por Q to find 5 movies that are similar to Rear Window. Suppose that Bob is one of the user. Describe a protocol to find the 5 most similar users in the data. How would predict the rating that Bob will give to Rear Window

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