Air flows isentropic ally through a convergent-divergent passage with inlet area 5.2 cm^2, minimum area 3.2cm^2 and exit area 3.87 cm^2. At the inlet the eir velocity is 100m/s, is 680 kPa, and temperature 345 K. Determine:
a) The mass rate of flow through the nozzle
b) The Mach number at the minimum-area section
c) The velocity and the pressure at the exit section