A reversible heat engine operates between \(875 \mathrm{~K}\) and \(310 \mathrm{~K}\) and drives a reversible refrigerator operating between \(310 \mathrm{~K}\) and \(255 \mathrm{~K}\). The engine receives \(2000 \mathrm{~kJ}\) of heat and net work output from the arrangement equals \(350 \mathrm{~kJ}\). Make calculations for cooling effect.