No! It is indeed a lot of rep, some of it very demanding. Take this course at your own pace. It is best if you can be familiar with the play-along selection (A.) every week, and try to play along on mute with the NIU violist presenting. Beyond that, you may dabble in the other selections as much or little as you feel able.
If you are preparing every selection in full, that will make for a robust and challenging course of study for your entire summer. It’s good to learn at least a few lines of each piece presented, but there will never be a playing test or audition.