1. The problem statement, all variables and given/known data It's a superposition problem and I have to find i0 and v0. [PLAIN]http://img214.imageshack.us/img214/2051/superquestion.jpg [Broken] 2. Relevant equations KCL, KVL 3. The attempt at a solution I can do the problem (I think) but I just don't know what loop to assign that 7.5A current source. I think it belongs to either i1 or i3, but can someone tell me why it belongs to one loop and not the other? EDIT: I just realized it was i3-i1. i don't know how I didn't see that.