A reversible heat engine receives heat from two thermal reservoirs maintained at constant temperatures at \(750 \mathrm{~K}\) and \(500 \mathrm{~K}\). The engine develops \(100 \mathrm{~kW}\) and rejects \(3600 \mathrm{~kJ} / \mathrm{min}\) of heat to a heat sink at \(250 \mathrm{~K}\). Determine thermal efficiency of the engine and heat supplied by each thermal reservoir.