Balance the following using Half Reactions \text { 1. } \mathrm{SeO}_{4}{ }^{2-}+\mathrm{Cl} \rightarrow \mathrm{Cl}_{2}+\mathrm{SeO}_{3}{ }^{2} \text { 2. } \mathrm{MnO}_{4}^{-}+\mathrm{SO}_{3}{ }^{2-} \rightarrow \mathrm{Mn}^{2+}+\mathrm{SO}_{4}{ }^{2}