Please, I need your help with this... it's starting to annoy me. I just don't know where are the tension forces... I get really confused doing this kind of things with pulleys and ropes. Look at pulley 4, I've seen that the tension force in the right is upward but why? Isn't that the pulley just changes the direction of the force? So then it would be downward.. I just cannot understand why is it upward. Thanks!