Hi Claire,

In general, we have some information here: https://classes.areteem.org/static/MCIIBSampleSyllabus.html that includes a set of answer keys.

That being said, I also "submitted" blank Week 1 and Week 2 assignments, so if you go to the II-B Spring course page and click the first and second week quizzes (for chapter 1 and 2) you should now be able to review them and see answers and solution ideas.

Hope that helps!