A tertiary alcohol, among the following, is _____.

The IUPAC name of the given compound is _______.

$$\begin{gathered} {\mathrm{CH}}_{\mathrm{3}}\mathrm{-}\underset{|}{\mathrm{C}}\mathrm{H}-{\mathrm{CH}}_{\mathrm{2}}-{\mathrm{CH}}_{\mathrm{3}} \\ \mathrm{OH} \end{gathered}$$

IUPAC name for the compound

$$\begin{gathered} {\mathrm{H}}_{\mathrm{3}}\mathrm{C}-\underset{|}{\mathrm{C}}\mathrm{H}-{\mathrm{CH}}_{\mathrm{2}}-\mathrm{CHOH}-{\mathrm{CH}}_{\mathrm{3}} \\ {\mathrm{C}}_{\mathrm{2}}{\mathrm{H}}_{\mathrm{5}} \end{gathered}$$ is _____.

The IUPAC name of 

$\mathrm{HO}-{\mathrm{CH}}_{\mathrm{2}}-\mathrm{CHOH}-{\mathrm{CH}}_{\mathrm{2}}\mathrm{OH}$ is _____.