2. An actual vapor-compression fridge-freezer circulates R-134a at a mass flow rate of 0.25 kg/sec. Its compressor has an isentropic efficiency of 88%. The pressures of the refrigerant in the evaporator and condenser are 200 kPa and 1400 kPa respectively. The R-134a enters the compressor superheated above saturation temperature by 10.09°C and leaves the condenser subcooled below saturation temperature by 4.40°C. Determine (a) the rate of cooling provided by the evaporator (kW), the power input (kW), and the COP. Determine (b) the same three parameters if the cycle operated on the ideal vapor-compression refrigeration cycle between the same pressure limits.