(a) Calculate minimum water flow rate (L’min) to perform the operation. If a multistage/multitray absorber column was used for the above process, how many trays/stages (N) will be required to perform the required operation? Calculate and show the concentrations after each stage. (b) If the actual liquid rate is 1.4 times the minimum value, what is the outlet liquid composition (XN)? (Hint: Do not calculate the number of trays/stages and concentrations for each stage. Try to infer from mass balances/operating line equation.) (c) If the actual liquid rate is 1.4 times the minimum value, solve for the actual number of trays using graphical methods/EXCEL/MATLAB/MATHCAD etc. Calculate and show the concentrations after each stage. (d) If the actual liquid rate is 1.4 times the minimum value, solve for the actual number of trays using the Kremser relationship