The lab is done in groups of 2 or 3. In the beginning of each file please write (in comments) the names fo all group members.
At the end of the lab please send me and your group partner(s) all your Scheme files as e-mail attachments. My e-mail is elenam at morris.umn.edu. The subject of your e-mail must be "1301 Lab 3" followed by "Final" or "Not final", depending on whether this is a final submission or you are still working on it. If you need to finish it, make sure to set up a time with your group partner(s) to finish the lab.
Due Friday, September 18, at 5pm. If you submit the final version during the lab, you are done.
Finish exercise 5.1.5.
Important: include test cases for your check-color function, for instance:
(check-color 'red 'yellow 'green 'red)