Please help me tackle this problem!! I really need some help. I seem to be having lots of PROBLEMS with PHYSICS. Our lab group project (due Monday!) is to design and test four pulley systems to lift our prof who will be sitting in a chair in the front of the class. We decided to split up the systems we came up with. So, this is the one my lab partners gave me to analyze. I have to come up with the mechanical advantage of this system. I tried to draw a force diagram. But I don't know what to do next. I don't think I can get it to work!!!! I need to get this done because I will be demonstrating this pulley system on Monday morning in front of the class!!! I don't want to look foolish up there. I really need some help. Thanks!