Distillation of a binary mixture of a and b with equal moles and relative volatility of 2.1, leads to produce a distillate of 98%a, an intermediate (side product) of 80%a and a residue of 3%a; which is equal to 40% of a fraction in the feed (a) what is the appropriate equation for intermediate operating line? (b) show the three operating lines in mccabe-thiele plot. (c) calculate the products rates for basis of 100mol feed. (d) calculate the minimum reflux for liquid at its boiling point. (e) calculate the increase rate of reflux moles by extracting the intermediate product.