3- In the following half-reaction: Co + 4 +CoCl2 + 2e indicate: - the redox couple involved .... -the oxidized species of the couple.. - the (algebraic) charge number of the oxidant. - the (algebraic) stoichiometric number ... of the reducing agent - the element undergoing oxidation ..... -the oxidation number of the oxidized element... - the direction of the reaction oxidation reduction