The first order reaction $AB$ is carried out in a CSTR to produce a marketable product containing $90$mol$\%B$ with balance A$.$ In anticipation of an increase in the demand for this product to $4$ times of its current production capability at the same purity, the management decided to acquire more CSTR$($s$)$ with the same specifications as the one in use. Engineer $1$ proposed to buy three more CSTRs while Engineer $2$ proposed to buy just one.

The conversion will be kept the same as there is no incentive to produce a purer product.

$($a$)$ Is this a prudent decision, i$.$e$.$ can you instead make do with the current reactor to meet the new market demand?

$($b$)$ If you are the manager, whose recommendation will you follow?