Thermodynamics piston stetch question

[hins2014]

Homework Statement

Homework Equations

specific volume = volume / mass
dryness fraction = mass of vapor / total mass
pressure

The Attempt at a Solution

part(a) is totally not relevant to part(b) and I finished part (b)i
dryness fraction = 0.5244
specific volume = 0.0502 m^3/kg
specific internal energy = 1800 KJ/kg

Then, I want to use the relationship between the volume of original and final state to final out the pressure. However, I can't use the above information to calculate the answer.
Therefore, I want to ask about the question about (b)ii - v.
Thanks.

 

[Chestermiller]

What temperature would be consistent with only having saturated vapor at the final specific volume?