Give the major products that are formed by heating each of the following ethers with HI.
(i) `CH_(3)-CH_(2)-overset(CH_(3))overset("| ")(C )H-CH_(2)-O-CH_(2)-CH_(3)`
(ii) `CH_(3)-CH_(2)-CH_(2)-O-overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C )-CH_(2)-CH_(3)`
(iii)