A gas contained within a piston-cylinder assembly undergoes three processes in series: Process 1-2: Constant volume from state 1 where p1 = 1 bar, V1 = 4 m3 to state 2, where p2 = 2 bar. Process 2-3: Compression to V3 = 2 m3, during which the pressure-volume relationship is pV=const. Process 3-4: Constant pressure to state 4, where V4 = 1m3 Sketch the processes in series on p-V coordinates and evaluate the work on each process, in kJ.