$(1$ point$)$ Suppose that an object moves along the $\backslash ($ y $\backslash )-$axis so that its location is $\backslash ($ y$=$x$^\{2\}+3$ x $\backslash )$ at time $\backslash ($ x $\backslash ).($Here $\backslash ($ y $\backslash )$ is in meters and $\backslash ($ x $\backslash )$ is in seconds.$)$

$($A$)$ Find the average velocity $($the average rate of change of $\backslash ($ y $\backslash )$ with respect to $\backslash ($ x $\backslash ))$ for $\backslash ($ x $\backslash )$ changing from $2$ to $8$ seconds $($include units help $($units$)).$

Average velocity $=$

$($B$)$ Find the average velocity for $\backslash ($ x $\backslash )$ changing from $5$ to $\backslash (5+$h $\backslash )$ seconds.

Average velocity $=$

$($C$)$ Find the instantaneous velocity at $\backslash ($ x$=5\backslash )$ seconds $($include units help $($units$)).$

Instantaneous velocity $=$