$($Solve b$)$ and c$)$ please$)$ Problem $2$: Find the following limits$.$ If the limits do not exist then explain.

$($a$)\backslash$lim$\_($z$->$z$\_(0))($z$)/((()/($bar$)($z$)))($should be does not exist$)$

$($b$)\backslash$lim$\_($z$->$z$\_(0))($Rez$)/((()/($bar$)($z$)))$

$($c$)\backslash$lim$\_($z$->0)($zRez$)/((()/($bar$)($z$)))=0$