1. The problem statement, all variables and given/known data Just help me with 18 b. 2. Relevant equations V1 = c1I1Z1. Same for V2,3,45. V = V1+V2+V3+V4+V5. V/I=Z=impedance. 3. The attempt at a solution Maybe because of symmetry Z1=Z2 & Z3=Z4. Perhaps Z5 takes out one of the branches??? Can I get a hint?