Air expands through a turbine from 7bar, 960 K to 1.0 bar, 450 K. The inlet velocity is small compared to the exit velocity of 75 m/s. The turbine operates at steady state and develops a power output of 2869 kW. Heat transfer between the turbine and its surroundings and potential energy effects are negligible. Modeling air as an ideal gas, calculate the exit area, in cm.