In the reaction $CH_3-CH(CH_3)-CH_2-O-CH_2-CH_3 + HI \xrightarrow{\text{Heated}} \dots$,which of the following compounds will be formed?

The following are possible syntheses of phenyl propyl ether. Which one would work?
$(i)$ $C_6H_5OH$ $\xrightarrow{KNH_2}$ $\xrightarrow{CH_3CH_2CH_2Br}$
(ii) $CH_3CH_2CH_2OH$ $\xrightarrow{NaOH}$ $\xrightarrow{C_6H_5Br}$
(iii) $CH_3CH_2CH_2OH$ $\xrightarrow{NaH}$ $\xrightarrow{C_6H_5Br}$

Dimethyl ether when heated with excess $HI$ gives

The reaction of $CH_3-O-C_2H_5$ with $HI$ gives:

Ethanol reacts with $H_2SO_4$ at $140^\circ C$ to form

Two isomeric compounds $I$ and $II$ are heated with $HBr$. The products obtained are