3. We are separating a mixture of 1,2 dichloroethane and 1,1,2 trichloroethane in a distillation column. Column is at 1atm. The feed is a saturated liquid and has 60 mol\% 1,2 dichloroethane. Feed rate is 100kmol/h. We desire a bottoms product as 1.77mol%1,2 dichloroethane and a distillate that is 99.15 mol\% 1,2 dichloroethane. If the reflux ratio is 2.23 , find the total number of stages and the optimal feed stage. Relative volatility of dichloroethane w.r.t trichloroethane is 2.4. Note the equilibrium data provided below is real experimental data and therefore not perfect - you may need to "smoothen" the data to use it for Mc-Cabe Thiele plot. Equilibrlum data from Bigg et al, Journal of Chemical \& Engineering Data 9.1 (1964): 17-19