Let the total cost function C$($x$)$ be defined as follows.

C$($x$)=0\mathrm{.}0001$x$3-0\mathrm{.}02$x$2+108$x $+4600$

Find the average cost function C$.$

C$($x$)=$

$$$0\mathrm{.}0001$x$20\mathrm{.}02$x$+108+4600$x$$

Find the marginal average cost function C $\text{'}.$

C $\text{'}($x$)=$