Air enters the compressor of an ideal air$-$standard Brayton cycle at $100$kPa, $300$K$,$ with a volumetric flow rate of $5$m$^3/$s$.$ The compressore pressure ratio is $10.$ The turbine inlet temperature is $1400$K$.$ Determine $($a$)$ the thermal efficiency of the cycle, $($b$)$ the net power developed, in kW$.$