What is the change in oxidation number and electric charge in following balance redox reaction CuS+SO_(4)^(2-)toCuO+SO_(2) ?

What is the change in oxidation number and electric charge in followin

1.	What is the change in oxidation number and electric charge in following balance redox reaction CuS+SO_(4)^(2-)toCuO+SO_(2) ?
Answer» `4.-4` 2. 0 4, -6 `6, 0` Solution : `CuS+3SO_(4)^(-2)+6H^(+)toCuO+4SO_(2)^(-)+3H_(2)O` Change in oxidation number = 6, Charges = 0