I'm not sure how to directly respond to Hunter2, but the question he asked me is what I don't know, like how do I know what the reducing agent and oxidising agent is without knowing the other half of the equation. For example, a previous question in the booklet asked the same question, except it gave the balanced equation given to me of:

5Fe{2+} + MnO4{-} + 8H{+} --> 5Fe{3+} + Mn{2+} + 4H2O

So I knew that the oxidation was where electrons were lost, which was:

5Fe{2+} --> 5Fe{3+} + 5e

and the reduction was where electrons were gained, which was:

MnO4{-} + 8H{+} + 5e --> Mn{2+} + 4H2O

So if I knew the whole equation I would know how to write out each half equation, so really my question is how do I do my question I posted without knowing the equation?