Construct, as complete as possible a $($T$,$x$)$ diagram for n$-$butane and n$-$heptane at p$=15$ bar. Estimate the saturation temperature of these two components at p$=15$ bar. Provide the graph and the data used to make it$.$Using the data from the $($T$,$x$)$ diagram you have just generated provide: the fraction of vapor fv and the equilibrium gas and liquid compositions for mixture with z$1=0\mathrm{.}6$ at T $=($Tb$+$Td$)/2...$ where Tb and Td are respectively the bubble and dew point temperatures at p $=15$ bar and z$1=0\mathrm{.}6$