It is about data analysis

the answer is 1.A 2. C

explain in detail, please

1.A latent-factor collaborative ltering model returned the following factorization of the utility matrix,

where rows represent users and columns represent items. What is the rating of item #2 (2nd column in

R, index starts at 1) by user #3 (3nd row in R, index starts at 1) predicted by this model?

A. -1

B. 0

C. 1

4

D. 2

E. 3

F. 4

G. 5

2. How many latent factors are used in the previous model?

A. 1

B. 2

C. 3

D. 4

R=121230101110011112