6. A gas with R = 187 N-m/(kg-K) and \(\gamma = 1.3\) flows through a variable area duct. At a certain point in the flow, the static pressure and temperature are 80 kPa and 15°C, respectively, while the velocity is 100 m/s. The gas is then isentropically expanded until its velocity is 300 m/s. Determine the pressure, temperature, and Mach number that exist the resulting flow.