$(1$ point$)$ Let $f(x)=-1-x^2.$ Find each of the following:

$($A$)\frac{f(5)-f(3)}{5-3}=$

$($B$)\frac{f(3+h)-f(3)}{h}=$

$($C$)\underset{h0}{lim}\frac{f(3+h)-f(3)}{h}=$