by ben reynolds.
Hello to Sweet Briar from Johns Hopkins!
You probably want to split these into three separate threads.
Here's the answer to your second question.
Require all group members submit
This setting will only appear if the teacher has ticked the "Require students click submit button" earlier. The assignment will not be classed as "submitted" until all members of the group have made a contribution. When one student has submitted, the other members of the group will be able to see who still has to submit.
https://docs.moodle.org/24/en/Assignment_settings#Students_submit_in_groups