A heat pump with R-134a enters the compressor as a saturated vapor at -16 C, and is

A heat pump with R-134a enters the compressor as a saturated vapor at -16⁰ C, and is compressed to 1 MPa at state2. The fluid cools isobarically until it enters the throttling valve at state 3 as a subcooled liquid at 1 MPa and 32⁰ C (you may estimate h3 as hf @ T = Tsat). Plot the coefficient of performance γ (Heat out per mass/work in per mass) as the efficiency of the compressor is varied from 1 to 0.25. Plot at least 5 data points. Remember that h1, h2s (but not h2), and h3 will be the same regardless of compressor efficiency.