Air (use the PG model) enters the compressor of an ideal air standard Brayton cycle at 100

Question:

Air (use the PG model) enters the compressor of an ideal air standard Brayton cycle at 100 kPa and 305 K with a volumetric flow rate of 5 m3/s. The compressor pressure ratio is 10. The turbine inlet temperature is 1000 K. Determine
(a) Net power output and
(b) The thermal efficiency (ηth,Brayton),
(c) Back work ratio. Use the PG model for air.