Label the hydrophilic and hydrophobic parts in the following compounds.
(i) ${\mathrm{CH}}_3{\left({\mathrm{CH}}_2\right)}_{10}{\mathrm{CH}}_2{\mathrm{OSO}}_3^{-}{\mathrm{Na}}^{+}$
(ii) ${\mathrm{CH}}_3{\left({\mathrm{CH}}_2\right)}_{15}{\mathrm{N}}^{+}{\left({\mathrm{CH}}_3\right)}_3{\mathrm{Br}}^{-}$
(iii) ${\mathrm{CH}}_3{\left({\mathrm{CH}}_2\right)}_{16}\mathrm{COO}{\left({\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{O}\right)}_{\mathrm{n}}{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{OH}$