$($a$)$ Estimate the fugacity and fugacity coefficient of n$-$Pentane liquid at its normal boiling point temperature and $200$ bars.

$($a$)$ Liquid cyclopentane at $110C$ and $275$ bars. At $110C$ the vapor pressure $($saturated pressure$)$ of cyclopentane is $5\mathrm{.}267$ bar. Estimate fugacity and fugacity coefficient.

$($b$)$ From data in the steam tables, determine a good estimate for $\frac{f}{f^{\text{s}\text{a}\text{t}}}$ for liquid water at $150C$ and $150$ bars, where $f^{\text{s}\text{a}\text{t}}$ is the fugacity of saturated liquid at $150C.$