An ideal gas initially at 600 K and 10 bar undergoes a four-step mechanically reversible cycle in a closed system .in step 12, pressure decreases isothermally to 3 bar, in step 23, pressure decreases at constant volume to 2 bar,in step 34, volume decreases at constant pressure; and in step 41 ,the gas returns adiabatically to the initial state. Take Cp=(7/2)R and Cv=(5/2)R .Sketch the cycle in PV diagram.