$-$ Need help on how to plot the charts for the T$-$x$-$y and x$-$y phase diagram for the second half of the question$(5\mathrm{.}4-5\mathrm{.}5).$ Please show detailed steps, thank you!

Prepare T$-$x$-$y phase diagram.

Prepare x$-$y phase diagram.

When a solution containing $40$mol$\%$ isopropanol is slowly vaporized, what is the composition of the initial

vapor?

If the mixture in $4\mathrm{.}6$ is heated until $75$mol$\%$ is vaporized, what are the compositions of the equilibrium vapor

and liquid?

Calculate K$-$value and relative volatility at $90C.$