I’m having a hard time understanding what is being asked in Q1.3 & 1.4 of homework 1:

- Compute 𝐶=𝐴𝐵, treating 𝐴 as a matrix but computing the result for each column of 𝐵 one at a time.
- Compute 𝐶=𝐴𝐵, treating 𝐴 and 𝐵 as collections of vectors.

How do we “treat A as a matrix” or a “collection of vectors”?