Complete the following reactions:
$(i)$ Liberation of dihydrogen gas from methane.
(ii) Oxidation of $2$-methylpropane.

(N/A) $(i)$ The reaction of methane with steam is used for the industrial production of dihydrogen:
$CH_{4(g)} + H_{2}O_{(g)} \xrightarrow[Ni]{1273 \ K} CO_{(g)} + 3H_{2(g)}$
(ii) Oxidation of $2$-methylpropane $(isobutane)$ with potassium permanganate $(KMnO_4)$ yields $2$-methylpropan-$2$-ol ($tert$-butyl alcohol):
$(CH_{3})_{3}CH \xrightarrow{[O]} (CH_{3})_{3}COH$