Question 1: The other members of my assignment group are not responding to my attempts to contact them; some of them may have dropped the course. What should I do in this case?

Answer to Question 1: In a situation where not all assignment group members are willing to work together to complete an assignment, the members who are willing to work to complete the assignment should go ahead and work to complete the assignment (even if in the whole group there is only one member who is willing to work to complete the assignment).