[7.10] • As one mode of operation of an air-conditioner is the cooling of a room on a room on a hot day, it works as a refrigerator. . A total of 4 kW should be removed from a room at 24°C to the outside atmosphere at 35°C. Assuming it is a Carnot cycle refrigerator (or A/C system), estimate (a) the coefficient of performance (COP) of the system and (b) the magnitude of the required (smallest amount possible) work or power input [in kW].