Air expands through a turbine from 10 bars, 900K to 1 bar, 500K. The inlet is small compared to the exit velocity of 100m/s. The turbine operates at steady state and develops a power output of 3200kW. Heat transfer between the turbine and its surroundings and potential energy effects are negligible. Calculate the mass flow rate of air, in kg/s and in exit area in m^2.