Please plot the $60$ mole percent ethane and $500$ psia on the $-40$ F saturation envelope on the given graph. Second draw the tie$-$line.

$1400612001000800$&$600400200100200300$Temperoture, deg F$5$CompositionNo. Wt $\%$ ethane$100\mathrm{.}0010400890\mathrm{.}2270\mathrm{.}2250\mathrm{.}2529\mathrm{.}919\mathrm{.}786\mathrm{.}143\mathrm{.}271\mathrm{.}25$n$-$Heptane$610500$