Air enters the compressor of an ideal air standard Brayton cycle at 100 kPa, 25°C, with a volumetric flow rate (-V?) of 8 m3/s. The compressor pressure ratio is 12. The turbine inlet temperature is 1100°C. Use the PG model for air. Determine the thermal efficiency (?th). Determine the net power output (W?net). Determine the back work ratio