A feed mixture of A and B $(45$ mole$\%$ A and $55$ mole$\%$ B$)$ is to be separated into a top product containing$96$ mole$\%$ A and a bottom product having $95$ mole$\%$ B$.$ The feed is $50\%$ vapour and the reflux ratio is maintainedat $2\mathrm{.}33.$ What is the equation of the feed line? Determine the number of ideal trays required and the location ofthe feed tray. Given: AB $=2\mathrm{.}8.$