How do I balance these oxidation reduction equations using the half cell method?

[amesalot57]

I do not understand how to balance these oxidation reduction equations.
These equations seem really complicated, I don't understand them. The question that i have to answer is
Balance the following equations by the half cell method. Show both half cell reactions and identify them as oxidation or reduction.
a) SO3^2- + MnO4-+ H+ (arrows) Mn2+ + SO4^2- + H2O
b) Cl2 + OH- (arrows) Cl- + ClO3- + H2O
c) SO4^2- + I- + H+ (arrows) S2- + I2 + H2O

 

[chemisttree]

You need to start by writing out the half reactions. For example the half reaction of iron +3 being reduced to iron +2 would be:

Fe+3 + e- ---> Fe+2

Try it from there.