Refrigerant R-134a enters the compressor of an ideal vapor-compression refrigeration system as saturated vapor at -10oC and

Question:

Refrigerant R-134a enters the compressor of an ideal vapor-compression refrigeration system as saturated vapor at -10oC and leaves the condenser as saturated liquid at 35oC. For a cooling capacity of 20 kW, determine
(a) The coefficient of performance (COPR).
(b) The mass flow rate,
(c) The compressor power in kW and