i$)$ Wet steam of $90\%$ steam quality and $65\mathrm{.}0$ bar passes through a valve and is throttled down to a pressure of $1\mathrm{.}00$ bar. What is the steam quality and entropy of the outlet stream? You may assume the process is adiabatic and potential$/$kinetic energy changes are negligible.

ii$)$ Wet steam of $90\%$ steam quality and $60\mathrm{.}0$ bar is compressed to a superheated steam at $65\mathrm{.}0$ bar and $290C$ using a compressor in a steady$-$state flow process. Determine: a$)$ the shaft work $(k\frac{J}{k}g)$ required by the compressor, and; b$)$ the efficiency of the compressor. You may assume the process is adiabatic and potential$/$kinetic energy changes are negligible.

iii$)$ Wet steam of $95\%$ steam quality and $65\mathrm{.}0$ bar is expanded to wet steam of $80\%$ steam quality at $1\mathrm{.}0$ bar using a turbine in a steady$-$state flow process. Determine: a$)$ the shaft work $(k\frac{J}{k}g$ produced by the turbine, and; b$)$ the efficiency of the expander. You may assume the process is adiabatic and potential$/$kinetic energy changes are negligible.