I'm trying to determine the voltages and currents at points A, B and C of the attached drawing. I tried it by using the superposition theorm. Only this doesn't work with the voltage source, because the current can't "run" through the circuit, because the currentsources are than deleted, and there is no closed circuit. My question is: what is the right way to calculate the voltages and current at the 3 points. And what are voltages and currents at the 3 points? Thanks for your help!