$2-\text{Phenylethanol}$ can be prepared by the reaction of phenylmagnesium bromide with which of the following?

The possible final products $R$ and $S$ of the following reaction sequence are:

The only alcohol that can be prepared by the indirect hydration of alkene is

Show how will you synthesize:
$(i)$ $1-$phenylethanol from a suitable alkene.
$(ii)$ cyclohexylmethanol using an alkyl halide by an $S_{N}2$ reaction.
$(iii)$ pentan$-1-$ol using a suitable alkyl halide?

$3-$methylpentan$-3-$ol will be prepared from

What are $X$ and $Y$ in the following reactions?
$CH_2O \xrightarrow[(ii) H_3O^+]{(i) X} CH_3(CH_2)_2CH_2OH$
$Y \xrightarrow[(ii) H_3O^+]{(i) C_2H_5MgBr} CH_3CH_2C(CH_3)_2OH$