A 2-component mixture (A+B) is distilled in a 41-stage distillation column. The feed is given to the 21st stage. The flow rate of the feed is F=1 mol/min, xF=0.5 (A' is considered), qF=1, AB=1.5. Flow returned to the column from the upper region, LD=2.7 mol/min, overhead product flow rate, D=0.5 mol/min. Find the liquid and vapor compositions in each stage in the MATLAB environment for steady and unsteady state. To find unstable compounds, 1% negative and positive step effects will be given to the LD flow rate returning to the distillation column.