The function $s=f(t)$ gives the position of a body moving on a coordinate line, with $s$ in meters and $t$ in seconds.

$s=8t-t^2,0t8$

Find the body's displacement and average velocity for the given time interval.

$0m,0\frac{m}{sec}$

$128m,-8\frac{m}{sec}$

$128m,16\frac{m}{sec}$

$-128m,-16\frac{m}{sec}$