I, as a student, recently created a group in anticipation of an upcoming quarter-long project. However, I accidentally left out 2 people. When I tried to add them after the fact, I found myself unable to do so, nor could I delete the group to start over. The obvious solution would be to contact my professor, but I think he would rather not be bothered with such a non-urgent matter. Is there a way to do these things autonomously as a student?