2) Equilibrium data for the benzene (1) and toluene (2) system at P = 101.3 kPa are: X1 0.10 0.20 0.30 0.40 0.50 0.70 0.60 0.80 0.90 yi 0.21 0.37 0.51 0.64 0.72 0.79 0.86 0.91 0.96 a In typical practice, a distillation column is controlled by manipulating the reboiler duty. A saturated vapor feed of a 50/50 mixture of benzene and toluene is distilled in a 12 tray distillation column. The column is equipped with a total condenser and a partial reboiler. It operates at 1 atm pressure. The column is currently recovering 95 mol% of the benzene in the distillate at 90% purity. It is necessary to increase the purity of the product from 90 mol% to 95 mol% by using the same column. By what amount (give answer as a percentage increase or decrease) should the column reboiler duty be changed to generate the new purity