1. The problem statement, all variables and given/known data Hi I am working on a study task. This is the schematic of the circuit. (all resistors are 1 k ohms.) I need to calculate the following values of resistance that will be seen between the pairs of nodes, indicated by the subscripts. REF , RCD and RAB (That is, REF refers to the total resistive effect between node E and node F. This is the resistance that would be 'felt' or 'seen' by a current injected at node E and extracted at node F. Multiple paths means multiple options, and a lowering of the effective resistance. 2. The attempt at a solution I understand how to calculate effective resistance for series or parallel although I am not sure how I would approach this as I am confused by the alternative paths and hence how to lower effective resistance between the nodes.