The PV graph is for an ideal gas cycle. Take AB as vertical & BC as horizontal. Let VA = 0.06 m3, Vc= 0.02 m3, Pc = 6 x 105 Pa, & TB = 900K. Take process C to A as isothermal.P C B A V3. Performance measures are always the ratio of the benefit we get divided by the cost to us. Refrigerator, Heat Pump, & Engine performance is reviewed on the last page of this document. a. If cycle A to B to C to A is an engine, find its efficiency. If not find the efficiency of the reverse cycle A to C to B to A. Give clear reasoning. b. If cycle A to B to C to A can be considered a refrigerator, find its COP. If not find the refrigerator COP of the reverse cycle. Give clear reasoning. c. If cycle A to B to C to A can be considered a heat pump, find its COP. If not find the heat pump COP of the reverse cycle. Give clear reasoning.Engine Efficiency = Wnet / Qin where Wnet = Wout - Win = Wby gas - Won gas Win = Won gas by environment (Cost) Tcold Summer Qin Food gas sys Qout Thot People (Benefit) AC/Refrigerator C.O.P. = Qin/Win Win = Won gas by environment (Cost) Winter That Qout gas sys Qir Tcold People (Benefit) Heat Pump C.O.P. = Qout/Win