An irreversible liquid-phase second-order reaction \(A \xrightarrow{k} B\) with rate constant \(k=0.2\ \mathrm{L\,mol^{-1}\,min^{-1}}\) is carried out isothermally in a non-ideal reactor. A tracer test gives the residence time distribution \(E(t)\) shown: three rectangles (i), (ii), (iii) of equal areas; rectangles (i) and (ii) span \(t=5\)–\(10\ \mathrm{min}\) (stacked), and (iii) spans \(t=10\)–\(15\ \mathrm{min}\). Pure \(A\) of concentration \(C_{A0}=1.5\ \mathrm{mol\,L^{-1}}\) is fed. Using the segregated model, determine the percentage conversion of \(A\) at the exit (rounded to the nearest integer).