2- A refrigerator using R-134a is located in a 20C room. Consider the cycle to be ideal. Saturated vapor at -10C enters the compressor, and the R-134a exits the compressor at 50C for 1 MPa compressor pressure. The condenser temperature is 40C. The mass flow rate of refrigerant around the cycle is 0.2 kg/s, and the coefficient of performance 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. (25 p)