b. Q kg/hr of a mixture of Ethanol (E), Toluene (T) and Water (W) was fed to a distillation columnas shown below. The operation is at steady state. The mass flow rates of ethanol at the top and the bottom streams are 800 and 125 Ekg/hr, respectively. Calculate the unknown streams (Q and S) and the unknown mass fractions: X, X, Y, Y, Me and My. [6] S Yw= 0.2875 YE YT Q Xw=0.45 XE XT 1500 Mw = 0.67 ME MT