When the following half reaction is balanced under basic conditions, what are the coefficients of the species shown? NiO₂ + H₂O

Question

When the following half reaction is balanced under basic conditions, what are the coefficients of the species shown?
NiO₂ + H₂O ---> Ni(OH)₂ + OH-
In the above half reaction, the oxidation state of nickel changes from _ to _

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