Determine the net heat transferred in these two processes, the net work, and the internal energy changes in kJ/kg. A mass of water vapor initially at 4.0  MPa  and 500°C (state 1) is cooled at constant volume to a temperature of 200°C (state 2). Heat is then extracted from the water at constant temperature until it reaches the saturated liquid state (state 3).
Determine:
a) The final pressure in bar
b) The final quality of the process at constant volume
c) The specific internal energy variation in kJ/kg in process 2-3