c) Calculate Person correlation coefficients between User 1 and 3 and between User 2 and 3. Note: covar([9,4,3,2], [9,5,4,2]) = 6.76; covar([8,6,1], [9,5,2]) = 8 Note: std (9,4,3,2) = 2.69; std (9,5,4,2) = 2.55; std (8,6,1) = 2.94; std (9,5,2) = 2.87 1. User 3 is the target user. Recommend products to User 3 using collaborative filtering. The following table summarize users' ratings on products. Product User 1's Rating User 2's Rating User 3's Rating A 9 8 9 B 4 6 5 C 3 4 D 8 6 E F G 629 6 1 2 7 3