i am using foglar 5th edition pg.164 for reference

1. (25 pts) Consider that an elementary, irreversible, gas-phase reaction: A 3B is carried out first in a plug flow reactor (PFR) isothermally with no pressure drop, where the feed consists of equal molar of A and an inert. The conversion after the PFR reaches 50%. The exit stream from the PFR is immediately fed to a continuous stirred-tank reactor (CSTR) of the same volume under the same reaction temperature and pressure (i.e., isothermally without a pressure drop). What is the conversion after the CSTR? a