We wish to produce B in the reaction A + B in a continuous reactor at u = 5 liter/min with CA0 = 4 moles/liter. However, we find that there is a second reaction B -+ C that can also occur. We find that both reactions are first order and irreversible with kl = 1.0 min^-1 and k2 = 0.1 min^-1. Find t, V, Sg, and Ys for maximum yield of B in a PFTR and in a CSTR.