Four hundred and fifty lbmol/h (204 kmol/h) of a mixture of 60 mol% benzene (LK) and 40 mol% toluene (HK) is to be separated into a liquid distillate and a liquid bottoms product of 95 mol% and 5 mol% benzene, respectively. The feed enters the column with a molar percent vaporization equal to the distillate-to-feed ratio. Use the McCabe- Thiele method to compute, at 1 atm (101.3 kPa): (a) Nmin (b) Rmin and (c) number of equilibrium stages N, for R/Rmin=1.3, and the optimal feed-stage location.