please show your step by step solution and formula used and i'll give a thumbs up

An irreversible liquid-phase second-order reaction, 2AB, with a rate constant of 0.04M/s, is carried out in a flow reactor. A 2.5M solution of A enters at a volumetric flow rate of 5L/s. It is desired to reach a conversion such that the exiting concentration of A is reduced to 0.25M. a. What is the conversion with respect to A ? b. If a CSTR is to be used, what will be the needed reactor volume? c. If a PFR is to be used, what will be the needed reactor volume? d. If the choice of reactor is based only on equipment cost per unit volume, which reactor should be used