T .. The figure below shows an ideal gas taken through a complete cycle A - B C D A (n = 4). The gas is initially in state A with pressure, volume, and temperature, respectively, of P, Vv, and T and it moves through the cycle with two isobaric and two isovolumetric processes. (Use the following as necessary: P'. and V;..] l} @ (a) Determine the net work done on the gas per cycle. W= | (b) Determine the net energy added by heat to the system per cycle. o