1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution First, I found all the impedance values. (starting from the left) Z1 = 1 / (j * 16E5 * 15E-9) = -j41.67 Z2 = 80 Z3 = 30 Z4 = j * 16E5 * 60E-6 = j96 I then combined Z1 and Z2. Z1 || Z2 = (-j41.67 * 80) / (80 - j41.67) = 17.07 - j32.78 Now this is where I'm stuck. I'm wondering if I should have transformed the current source, Ig, before combining Z1 and Z2 or if I should transform it after combining Z1 and Z2. I'm not really sure when to do a source transformation. If you could explain your reasoning I would greatly appreciate it.