Test students' ability to analyze complex series-parallel DC resistor circuits: identify series and parallel groupings, compute equivalent resistance, apply Ohm's law and basic Kirchhoff reasoning to determine voltages and currents for each component, and calculate power dissipation. Include multi-step problems with specified battery voltages and mixed resistor networks (voltage dividers, simple bridges) that require reduction, node/loop reasoning, correct units, and clear justification of steps.