The position of a car is given by the values in the table.

$\displaystyle \begin{array}{|c|c|c|c|c|c|c|} \hline t \text{ (seconds)} & 0 & 1 & 2 & 3 & 4 & 5\\ s \text{ (feet)} & 0 & 10 & 32 & 70 & 119 & 178\\ \hline \end{array}$

Find the average velocity for the time period beginning when $t=2$ and lasting
(1) 3 seconds, (2) 2 seconds, (3) 1 second

(Using the graph, one can estimate the instantaneous velocity when $t=2$ to be about 28 ft/s.)

(1) ft/s
(2) ft/s
(3) ft/s