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Complete and balance the following react...

Complete and balance the following reaction:
(i). `[MnO_4]^(2-)+H^(o+)to…+[MnO]^(ɵ)+H_2O`
(ii). `SO_(2(aq))+Cr_2O_7^(2-)+2H^(o+)to`….

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(i). `3MnO_4^(2-)+4H^(o+)toMnO_2+2MnO+2H_2O`
(ii). `2SO_2+Cr_2O_7^(2-)+2H^(o+)to3SO_4^(2-)+2Cr^(3+)+H_2O`
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