Air is flowing isentropically in a diverging duct. At the inlet of the duct, pressure, temperature, and velocity are 40 kPa, 220 K, and 500 m/s, respectively. Inlet and exit areas are 0.0002 m² and 0.0003 m². Determine the Mach number, pressure, and temperature at the exit. The specific heat ratio and gas constant for air are 1.4 and 287 J/kg·K, respectively.