A freezer is maintained at 20°F

A freezer is maintained at 20°F by removing heat from it at a rate of 75 Btu/min. The power input to the freezer is 0.70 hp, and the surrounding air is at 75°F. Determine,(a) The reversible power,, (b) The irreversibility, and, (c) The second-law efficiency of this freezer.