A piston-cylinder device contains 0.167 kg of air initially at 2.2 MPa and 344°C. The air is first expanded isothermally to 415kPa, then compressed polytropically with a polytropic exponent of 1.240 to the initial pressure, and finally compressed at constantpressure to the initial state. Determine the boundary work for each process and the net work of the cycle. Sketch the processes and states on both P-v and T-v diagrams.