2.24 A system consists of air in a piston-cylinder assembly, initially at pi The air is compressed to p2of 0.5 ft'. During the process, the relation between pressure and volume is linear. Determine the pressure, in lbf/in.², at an intermediate state where the volume is 1.2 ft’, and sketch the20 lbf/in.?, and occupying a volume of 1.5 ft'.100 lbf/in.? and a final volume process on a graph of pressure versus volume.