I'm having trouble with Thevenin models, specifically this question where the V_oc is not given. The problem: Assume an unknown circuit provides the specified current through the load resistors as given below: 100k - 2.3mA 1.2M - 510uA Find a Thevenin model for the unknown circuit. All I've been able to find on Thevenin requires me to find V_oc, which I don't know how to do from here. I've tried just using Ohm's Law, but that nets me 230V for the first case, and 612V for the second. Suggestions on how to proceed would be appreciated.