Find the specific work in Problem 3.54 for the case the volume is reduced. Saturated vapor R-134a

Question:

Find the specific work in Problem 3.54 for the case the volume is reduced. Saturated vapor R-134a at 50oC changes volume at constant temperature. Find the new pressure, and quality if saturated, if the volume doubles. Repeat the question for the case the volume is reduced to half the original volume.