The ethanol-water mixture is separated on a distillation column. Feed contains 20% ethanoland 1000 kmol / hour speed is entering the system. The feed temperature is 30ºC and its enthalpy is 15kcal / kg.Saturated feed steam enthalpy 485 kcal / kg and saturated feed liquid enthalpy70kcal / kg. Distillate has at least 80% ethanol and 2% ethanol concentration of the sub-productis required to be. The feedback / distillate ratio is 5/3. System pressure is 1 atm.There is a co-molar flow acceptance in the enrichment zone. Theoretical number of stages and feedingFind the stage (counting from above) into the system.