Give the structure of corresponding names.

$($a$)3,3-$dimethylcyclopentene

$($b$)$ cis$-3,4-$dimethylcyclopentene

$($c$)(2$Z$)-3-$chloro$-2-$heptene

Draw the products $D-$I of each reaction including stereoisomers.

$($a$)=H_2{O}_{H_{2}S{O}_4}D+E$

$($

$($c$)$

Select alkene reacts faster with $HBr$ and explain your choice.

Draw a stepwise mechanism for the following reaction, which results in ring expansion of a six$-$ to a seven$-$membered ring.