A refrigerator using R-134a is located in a 20◦C room. Consider the cycle to be ideal, except that the compressor is neither adiabatic nor reversible. Saturated vapor at −20◦C enters the compressor, and the R-134a exits the compressor at 50◦C. The condenser temperature is 40◦C. The mass flow rate of refrigerant around the cycle is 0.2 kg/s, and the COP is measured and found to be 2.3. Find the power input to the compressor and the rate of entropy generation in the compressor process.