It is desired to treat $10$ L$/$min of a liquid feed containing an initial concentration A of $1$ mol$/$L and reach X$3=0\mathrm{.}99.$ Stoichiometry and reaction kinetics

are given by:

Suggest a good arrangement to do this using $3$ CSTRs in series, find the volume of each reactor and its conversions $($X$1$ and X$2)$