Your company has decided to add an additional reactor to increase the conversion of your main product from $70\%$ to $95\%.$ Your reaction of concern is A$+$B $->$ C where $-$rA$=(0\mathrm{.}04$ Lmol$-1$ s$-1)$CaCb$.$ The current system includes a mixing point, long section of pipe, and a CSTR$.$ The mixing occurs right at the start of the long section of pipe. The entire system operates at $325$ Celsius. Both A and B are fed into the system at a partial pressure of $2$atm and a molar flow of $0\mathrm{.}8$mol$/$s$.$ The long section of pipe essentially acts as a PFR and consists of $100$ft of $4$in ID $($internal diameter$)$ PVC pipe. The resulting mixture is then fed into a $24\mathrm{.}3$m$3$ CSTR$.$ The current design has the mixture exiting at $70\%$ conversion. Please suggest a single additional reactor to add to the system $($either before or after the CSTR$)$ to bring the final conversion up to $95\%.$ You need to minimize the volume of the new reactor. You must include a flow diagram, drawn using a computer program of some sort.