A subsonic airplane is flying at a 3500 m altitude where the atmospheric conditions are 72 kPa

Question:

A subsonic airplane is flying at a 3500 m altitude where the atmospheric conditions are 72 kPa and 260 K. A pitot tube measures the difference between the static and total pressures to be 10 kPa. Determine
The speed of the airplane and
The flight Mach number.