(b) 10 points: Forty Five grams per second of air ows through a gas turbine, expanding from 1350 kPa to 101 kPa in a reversible polytropic manner. The air velocity at the inlet is 100 m/s at a temperature of 2000 K While the air velocity at the exit is 750 m/s. If the polytrpoic exponent n is 1.38. Determine the following: 1- The total generated power, 2- The rate of the total heat transfer, 3- The rate of the total enthalpy change, and 4- The rate of the total entropy change