The irreversible, gas-phase, non-elementary reaction A+ 2B C is to be carried out isothermally in continuous flow reactors. The feed is at a temperature of 227°C, a pressure of 1013 kPa, a volumetric flow rate of 1.85 m³/min, and its composition is 33.3% A and 66.7% B. Laboratory data taken under identical conditions are as follow: X 0.0 0.2 0.4 -1A (mol/m³.s) 0.010 0.005 0.002 0.6 0.001 a) If the feed is introduced to a PFR followed by a CSTR in series, calculate the total volume the reactors that is necessary to achieve an intermediate conversion of 40% and a final conversion of 60%. b) On the Levenspiel plot, shade the areas that represent the volumes of the PFR and the CSTR mentioned above.