I am having some trouble with this question. Can you please solve without using the steam table as that is how I have been learning to do it

Water initially at 200 kPa and 300C is contained in a piston-cylinder device fitted with stops. The water is allowed to cool until the piston rests on the stops where the volume is 0.673 of the initial volume. Then the water continues to cool until the pressure is 100kPa.

a) T-v and P-v diagram sketch, with the process curves pass through both the initial, intermediate, and final states of the water

b) Find the change in internal energy between the initial and intermediate states per unit mass of water

c) Find the change in internal energy in the initial and final states per unit mass of water

d) Calculate the amount of heat transfer throughout the first process

e) Calculate the amount of heat transfer throughout the second process