An ideal vapor-compression refrigeration cycle uses r-134a as the working fluid is used to cool a brine solution to -5 C. This solution is pumped to various buildings for the purpose of air conditioning. The refrigerant evaporates at -10 C with a total mass flow rate of 7.72 kg/s, and condenses at 600 kPa. Determine the COP ot the cycle and the total cooling load.