Steam flows steadily through an adiabatic turbine

Steam flows steadily through an adiabatic turbine. The inlet conditions of the steam are 4 MPa, 500∘∘C, and 80 m/s, and the exit conditions are 30 kPa, 92 percent quality, and 50 m/s. The mass flow rate of the steam is 12 kg/s. Determine

a) the change in kinetic energy
b) the power output, and
c) the turbine inlet area.

Answers:
a) -1.95 kJ/kg
b) 12.1 MW
c) 0.0130 m^2