3. Consider a nozzle in which the choked flow condition is attained at the narrowest section of the nozzle. The chamber has a stagnation pressure po and stagnation temperature To, and the narrowest section of the nozzle has an area At. A mass flow rate m across the nozzle is found for these conditions and the specific heat ratio is uniform across the entire nozzle. At another location downstream inside the nozzle, a new temperature Tx and pressure px are measured. What expression would you write for the area Ax at this location, based on To,po,Tx,px and At