$8.)$ Tosylates. Draw the arrow pushing mechanism for the following reaction.

$9.)$ E$2$ Elimination. The following three reactions are similar, differing only in the configuration of the

substrate. One of these reactions is very fast, another is very slow, and the other does not occur at all.

Identify each reaction $(x,Y$ or $Z)$ as fast, slow and no reaction. $($Hint: start by writing chairs for each of

these to better evaluate $)$