At the beginning of the compression process of a Miller cycle with a compression ratio of 8

Question:

At the beginning of the compression process of a Miller cycle with a compression ratio of 8 air is at 25oC, 101 kPa. The maximum temperature during the cycle is 1600oC. The minimum pressure during the cycle is 80 kPa. Determine
(a) The net work (wnet) output per unit mass,
(b) The thermal efficiency (ηth), and
(c) The mean effective pressure. Use the PG model for air.