Aheat pump with r-134a as the working fluid is used to keep a space at 25°c by absorbing heat from solar-heated water that enters the evaporator at 50°c at a rate of 0.065 kg/s, and leaves at 40°c. refrigerant enters the evaporator at 20°c with a quality of 15% and leaves at the same pressure as saturated vapor. if the compressor consumes 1.2 kw of power, determine (a) (0.5 point) the mass flow rate of the refrigerant, (b) (0.5 point) the rate of heat supply, (c) (0.5 point) the cop, and (d) (0.5 point) the minimum power input to the compressor for the same rate of heat supply.