information already filled out just need sketch for expected composition profiles when feed at middle stage

The feed to a distillation column is given below in component molar flowrates. We want recoveries of 95% for propane and 98% for n-butane. Identify the key (word, not abbreviation) for each component and estimate the distillate and bottoms component molar flowrates. For a column with the feed at the middle stage, sketch the expected composition profiles. (x vs. stage) Repeat identifying the key and estimating the component molar flowrates with recoveries of 95% for n-pentane and 98% for n-hexane. For a column with the feed at the middle stage, sketch the expected composition profiles