The professor explains that the mid-term is going to be replaced by group projects. This is because the class is so small that it's impossible to fit it all in. The professor tells the students that they're going to have to form their own groups to do the projects. The students are all excited about the idea of forming a group, but they don't really know how to do it. They're not sure how to form a group because they've only met a few people so far, and they'd rather not be associated with people they already know.