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12 Recommender Systems - Nearest Neighbors Consider the following user-movie rating matrix. Users\Movies A B D Alice 1 1 0 0 Bob 0 o 1 0 Carlos 1 1 1 1 David 1 1 0 1 Elina 0 1 1 1 2.Op a Using the cosine similarity measure and user-based collaborative filtering, who is Alice's nearest neighbor? Elina 3.Op b Insert the similarity score between Alice and her nearest neighbor (round to 2 decimal places): Answer 1.Op Which movie would you recommend to Alice based on the previous result? B