What amount of bromine will be required to convert $2 \ g$ of phenol into $2, 4, 6-$tribromophenol (in $g$)?

What are $X$ and $Y$ respectively in the following set of reactions?

Compound $A$ $(C_7H_8O)$ is insoluble in water,dilute $HCl$,and aqueous $NaHCO_3$,but it dissolves in dilute $NaOH$. When $A$ is treated with $Br_2$ water,it is converted into a compound $C_7H_5OBr_3$ rapidly. The structure of $A$ is

What are $A$,$B$ and $C$ in the following reactions?
$\text{Cumene}$ $\xrightarrow{O_2} A$ $\xrightarrow{H_3O^{+}} B + C$

The major product in the following reaction is:

The reaction is given as: $X \xrightarrow{Y} \text{Benzoquinone}$. Identify $X$ and $Y$ in the above reaction.