Air at 400°C and 0.4MPa is steadily supplied to an adiabatic gas turbine. The air leaves the turbine at 200°C and 0.10135 MPa. Neglecting changes in potential energy and kinetic energy, determine the following:

A. The ratio of the exit flow area to the inlet flow area required for an exit velocity equal to the inlet velocity.
B. The specific work (kJ/kg), assuming constant specific heats.