Please, can someone help me with redox reactions?

I had a chemistry test today and one of the questions was regarding half-equations for a reaction between Sulfuric Acid and Potium Iodide. The question was "write half-equations, and then the overall equation, for the oxidation of KI to I2 and the reduction of H2SO4 to SO32-". I usually understand these questions but this one has me stumped. Can you help? Please?!