Do exercises 13 through 22. Switch drivers with each problem.
Check in before proceeding on to the next step.
If you proceeded rapidly through these problems, save your work, start a new file, and do all of the exercises a second time. Change your alternation pattern so that each of you has the opportunity to do every problem as both driver and copilot.
(When learning to work in a new language, you're learning a new syntax as well as how to "think" in that language. Repetition is a useful tool in this context, and you would be well served to either repeat your work now, or repeat all of these exercises a second time, perhaps individually, after the lab period.)
