Examine the following half-reactions and select the strongest oxidizing agent among the species listed. Cr2+(aq) + 2e– LaTeX: \longrightarrow⟶Cr(s) E° = –0.913 V Fe2+(aq) + 2e– LaTeX: \longrightarrow⟶ Fe(s) E° = –0.447 V Sr2+(aq) + 2e– LaTeX: \longrightarrow⟶ Sr(s) E° = –2.89 V Co2+(aq) + 2e– LaTeX: \longrightarrow⟶ Co(s) E° = –0.28 V