A gas that is contained in a cylinder undergoes two processes that are in series. the first process, from 1 to 2, consist of a constant-pressure compression at 50 psia, and the volume goes from 0.5 to 0.25ft3. The second process consists of a constant-volume heating in which the pressure doubles to 100 psia. sketch the porcess on a p-v diagram, and determine the total work of the combined process.