The standard reduction potentials at 298 K for the following half cells are given: array…

The standard reduction potentials at 298 K for the following half cells are given:

\(\begin{array}{ll} Z n^{2+}(a q)+2 e^{-} \rightleftharpoons Z n(5) & E^{\prime \prime}=-0.762 \mathrm{~V} \\ C r^{3+}(a q)+3 e^{-} \rightleftharpoons C r(5) & E^{\prime \prime}=-0.740 \mathrm{~V} \\ Z H^{+}(a q)+2 e^{-} \rightleftharpoons H_{2}(g) & E^{\prime \prime}=0.000 \mathrm{~V} \\ F e^{3+}(a q)+e^{-} \rightleftharpoons F e^{2+}(a q) & E^{\prime \prime}=0.770 \mathrm{~V} \end{array}\)

Which is the strongest reducing agent?