At the inlet of an adiabatic duct with constant cross-sectional area, the pressure, the temperature and the velocity are 0.122 MPa, 16 C and 127 m/s, respectively. The length and diameter of the duct are 6.5 m and 50 mm, respectively. If the average friction factor is 2.8 x 10-3, determine the Mach number, temperature and pressure at the exit of the duct. What is the maximum mass flow rate in this system.