A frictionless piston-eylinderdevice initially contains air at 200 kPa and 0.2m3. At this...

A frictionless piston-eylinderdevice initially contains air at 200 kPa and 0.2m3. At this state, a linear spring (F ∝ x) is touching the piston but exerts no force on it. The air is now heated to a final state of 0.5 m3 and 800 kPa. Determine (a) the total work done by the air and (b) the work done against the spring. Also, show the process on a P-v diagram