The displacement (in feet) of a certain particle moving in a straight line is given by $y=\frac{t^{3}}{3}$.

(A) Find the average velocity for the time period beginning when $t=2$ and lasting
(i) .01 s:
(ii) .005 s:
(iii).002 s:
(iv) .001 s:

NOTE: For the above answers, you may have to enter 6 or 7 significant digits if you are using a calculator.

(B) Estimate the instantaneous velocity when $t=2$.