Can someone put into the right direction of how to do this question?

3. (4 pts) An ideal gas engine was constructed to run on the following cycle: Step A: Adiabatic compression from P1, V1, Tito P2, V2, T2 Step B: Isobaric expansion from P2, V2, T2 to P2, V3, T3 Step C: Adiabatic expansion from P2, V3, 7; to P4, V1, T4 Step D: Isochoric cooling from P4, V1, T4 to P1, V1, T1 Assume that 1.00 mole of an ideal gas starting at 302 K (T1), 1.000 atm and 24.8 L undergoes this cycle and that the engine is operating between heat reservoirs at 716 K (T3) and 302 K (T1). The first compression is to V2 = 12.4 L and the subsequent expansion is to V3 = 18.6 L. The heat capacity of the gas at constant volume may be assumed to be temperature independent and equal to 12.5 J/mol K. (a) Sketch the four steps of this cycle on a P-V coordinates. (b) Calculate qh, w and for this non-Carnot cycle. (c) Compare the efficiency of this cycle to that for a Carnot engine operating between the same two reservoirs. What do your results illustrate