Steam enters a nozzle operating at steady state at 5 MPa and 420oC with negligible velocity, and

Question:

Steam enters a nozzle operating at steady state at 5 MPa and 420oC with negligible velocity, and exits at 3 MPa and 466 m/s. If the mass flow rate is 3 kg/s. Determine
(a) The exit area,
(b) The exit temperature.
(c) The rate of entropy generation in the nozzle. Neglect heat transfer and PE.