4) A Carnot heat engine receives heat from a reservoir at 700C at a rate of 600kJ/min and rejects the waste heat to the ambient air at 22C. The entire work output of the heat engine is used to drive a refrigerator that removes heat from the refrigerated space at 7C and transfers it to the same ambient air at 22C. Determine a) The maximum rate of heat removal from the refrigerated space. 6P b) The total rate of heat rejection to the ambient air. 6P