a 60:40 liquid mixture of benzene and toluene is fed to a distillation column, which produces both a liquid and a vapour stream. The vapour leaves the top of the distillation column where it is completely condensed and split into two equal fractions. one fraction is taken off as a product stream and the other is fed back to the top of the column. the liquid leaving the bottom of the column is fed to a partial reboiler in which 40% of it is vaporized. the vapour from the reboiler is recycled to the column and the liquid is taken off as bottom product stream. the partial reboiler is at 500 mmHG and 90 C. 90% of the benzene is fed to the column leaves the condenser in the product stream. use a basis of 100 moles fed to the distillation column, draw a flow chart. Labell the process streams and unite operations. Perform degree of Freedom and find the molar flow rate and composition for all process streams