Distillation:

One chemical plant wants to separate propane from pentane by distillation in a column. The feed flow contains $60$ mol$-\%$ propane anc

it is desired to purify it into $95$mol$\%$ distillate. The aim is to maintain the propane content of the bottom product at $2\mathrm{.}5$mol$-\%.$

Calculate the number of theoretical trays required when the feed is $50\%$ vaporized and the return ratio is $0\mathrm{.}25.$

Attached is an x$,$y$-$diagram of the propane$-$pentane mixture. Use it and make the necessary markings and draw $($with a rough level$)$ the graphs

you need. Take a picture of your graphs and return it to separate return box. Explain all needed steps and the methods you have used.