An ideal gas refrigeration cycle using air as a working medium maintains a refrigerated space at -18∘C while rejecting heat to the surrounding medium at 27∘C. If the pressure ratio is 4 and the ou__________. a) outlet temperature of the compressor is 15°C b) outlet temperature of the compressor is 60°F c) outlet temperature of the compressor is 270 K d) outlet temperature of the compressor is 300 K