Air expands in an isentropic horizontal nozzle from inlet conditions of 1.0 MPa, 850 K, 100 m/s

Question:

Air expands in an isentropic horizontal nozzle from inlet conditions of 1.0 MPa, 850 K, 100 m/s to an exhaust pressure of 100 kPa. Using Nozzle Simulator RIA(linked from the left margin).
(a) Determine the exit velocity (V2).
(b) Plot how exit velocity varies with inlet pressure varying from 500 kPa to 1 MPa.