Consider a simple Brayton cycle using air as the working fluid; has a pressure ratio of 12; has a maximum cycle temperature of 600°C; and operates the compressor inlet at 90 kPa and 15°C. Which will have the greatest impact on the back-work ratio: a compressor isentropic efficiency of 90% or a turbine efficiency of 90%? Then, repeat the problem using an exergy analysis by calculating which case will result in a larger increase in reversible work. Use constant specific heats at room temperature.