Write the methods for the preparation of ethane.

(N/A) $(i)$ Hydrogenation of ethene: $CH_{2}=CH_{2} + H_{2} \xrightarrow{Pt/Pd/Ni} CH_{3}-CH_{3}$
$(ii)$ Reduction of ethyl chloride: $CH_{3}CH_{2}Cl + H_{2} \xrightarrow{Zn, H^{+}} CH_{3}-CH_{3} + HCl$
$(iii)$ Wurtz reaction: $2CH_{3}Br + 2Na \xrightarrow{\text{dry ether}} CH_{3}-CH_{3} + 2NaBr$
$(iv)$ Decarboxylation of sodium propanoate: $CH_{3}CH_{2}COONa + NaOH \xrightarrow{CaO, \Delta} CH_{3}-CH_{3} + Na_{2}CO_{3}$
$(v)$ Kolbe's electrolysis: $2CH_{3}COONa + 2H_{2}O \xrightarrow{\text{electrolysis}} CH_{3}-CH_{3} + 2CO_{2} + H_{2} + 2NaOH$