Find each limit$.$ Use $-$ or $$ when appropriate.

$f(x)=-\frac{2x-8}{(x-8{)}^4}$

$($A$)\underset{x{8}^{-}}{lim}f(x)$

$($B$)\underset{x{8}^{+}}{lim}f(x)$

$($C$)\underset{x8}{lim}f(x)$