4. A heat pump operating on the ideal vapor compression refrigeration cycle with R-134a as the working fluid absorbs heat from geothermal water that enters the evaporator at 50°Cat a

rate of 0.065 kg/s and leaves at 40°C. The heat pump operates under the pressure limits of 0.12 MPA and 0.7 MPa. Determine the mass flow rate of the refrigerate, the heat provided by the heat pump in (kW), and the COP of the heat pump. Assume a saturated vapor at the exit of the evaporator and a saturated liquid at the exit of the condenser.