Steam at 5 MPa and 400C enters a nozzle steadily with a velocity of 80 m/s, and

Question:

Steam at 5 MPa and 400°C enters a nozzle steadily with a velocity of 80 m/s, and it leaves at 2 MPa and 300°C. The inlet area of the nozzle is 50 cm2, and heat is being lost at a rate of 120 kJ/s determine
(a) The mass flow rate of the steam,
(b) The exit velocity of the steam, and
(c) The exit area of the nozzle.