Consider the function $f(x)=8(x-5{)}^{\frac{2}{3}}.$ For this function there are two important intervals: $(-,A)$ and $(A,)$ where $A$ is a critical number.

Find $A$

For each of the following intervals, tell whether $f(x)$ is increasing $($type in INC$)$ or decreasing $($type in DEC$).$

$(-,A)$:

$(A,)$: