Question 1 15 pts An air conditioner operating at steady state maintains a dwelling at 20C on a day when the outside temperature is 35C. Energy is removed by heat transfer from the dwelling at a rate of 7.5 kW while the air conditioner's power input is 1.5 kW. Determine (a) the coefficient of performance of the air conditioner and whether the cycle operates reversibly, operates irreversibly, or is impossible and (8 points) (b) the power input required by a reversible refrigeration cycle providing the same cooling effect while operating between hot and cold reservoirs at 35 C and 20 C, respectively. (7 points)