2) A reversible heat engine operates between two reservoirs at temperatures of 600 C and 40 C. The engine drives a reversible refrigerator, which operates between reservoirs at temperature of 40 C and -20C. The heat transfer to the heat engine is 2000kJ and the net work output of the combined engine- refrigerator plant is 360kJ. Determine the heat transfer to the refrigerant and the net heat transfer to the reservoir at 40C.