Agas-turbine power plant operates on the simple brayton cycle between the pressure limits of 100 and 1600 kpa. the working fluid is air, which enters the compressor at 40°c at a rate of 850 m3 /min and leaves the turbine at 650°c. assuming a compressor isentropic efficiency of 85 percent and a turbine isentropic efficiency of 88 percent, determine (a) the net power output, (b) the back work ratio, and (c) the thermal efficiency. use constant specific heats with cv = 0.821 kj/kg·k, cp = 1.108 kj/kg·k, and k = 1.35.