Well... probably should asked the girl on the team to be the manager... Too late for that I guess.
On the plus side, if we don't complete the project, we get penalised in the exam. (starting with -20 marks) So, it's in their interest to do the project and to do it well.
I don't really know the other 5 that well. So I can take the "I am the boss first and I am the boss second" approach.