A vapor-compression refrigeration system using R-134a us being used to keep a food storage room at desired cold temperature. At steady state conditions, the evaporator temperature is 0 ⁰C, and the condenser temperature is 45 ⁰C. The cooling load on the refrigeration system is 10 tons of refrigeration. The vapor entering the compressor are superheated by additional 10 ⁰C and the liquid refrigerant entering the expansion valve is subcooled by additional 5 ⁰C. Calculate the refrigerant flow rate, the compressor power if the compressor efficiency is 80% and coefficient of performance for this system. Use p-h chart for enthalpy values.