Using the standard reduction potentials, $P{b}^{2+}(aq)+2e^{-}Pb(s),E=-0\mathrm{.}13VF{e}^{2+}(aq)+2e^{-}Fe(s),E=-0\mathrm{.}44VZ{n}^{2+}(aq)+2e^{-}Zn(s),E=-0\mathrm{.}76V$ which metal will reduce $M{n}^{3+}$ to $)=(+1\mathrm{.}51(V)$ but will not reduce $T{l}^{+}$to $)=(-0\mathrm{.}34(V)Pb$ only $Zn$ only $Pb$ and $Fe$ Fe and $Zn$