Steam enters an adiabatic turbine at pressure = 6 MPa, temperature = 600oC, and velocity = 80 m/s, and leaves at pressure = 50 kPa, temperature = 100oC, and velocity = 140 m/s. If the power output is 5 MW, determine: (a) the mass flow rate of the steam flowing through the turbine, (b) the thermodynamic efficiency of the turbine.