1. The problem statement, all variables and given/known data Find I_0 using Nodal Analysis. http://img263.imageshack.us/img263/394/untitledph7.png [Broken] I'm kind of lost for where my box is on the upper right corner. I don't know how to model the 20v Vsource as a current... can you even do that? I've done the other nodes, though I'm not particularly sure yet.