Are we expected to know how to do the S-AES key expansion process to generate 3 round keys?

Can't seem to complete Homework #2, Problem #1 without those keys, but we never learned how to generate them in class. I re-watched the recorded video to verify that we never actually learned it.

Is everyone else just learning the process on their own? If anybody has a good resource on learning S-AES key expansions, please share! Thanks :)

Thank you so much! Exactly what I was looking for :)