(Solved): Table 1 is a utility matrix, representing ratings of six items by four users. (1) Regard the utili ...

Table 1 is a utility matrix, representing ratings of six items by four users. (1) Regard the utility matrix as a boolean matrix, calculate the jaccard similarity between A and C. (2) Calculate the cosine similarity between B and D. (3) Use collaborative filtering method with user-user similarity and k=2 (i.e., based on the top-2 similar users with respect to cosine similarity), predicate the rating of user C on item e. Notice: write the results as fractions rather than decimals. Items a b ? de f f Users A 4 4 1 2 | 5 B 2 3 2 5 | 2 ? 3 5 4. D 1. 3 5 4 Table 1 (Question 4)