Fifty grams of air undergoes a Stirling cycle with a compression ratio of 4. At the beginning of the isothermal process, the pressure and volume are 100 kPa and 0.05 m3, respectively. The temperature during the isothermal expansion is 990 K. Determine
(a) The net work (Wnet) output per kg and
(b) The mean effective pressure. Use the PG model.