d$.$ Use your result to compute the average velocity on $[1\mathrm{.}8,2]$ and on $[2,2\mathrm{.}3]$

e$.$ Use the answer from c to estimate the instantaneous velocity at $t=2.$

f$.$ What does the negative velocity tell us about the motion of the rocket at $t=2?$ What is the direction of the rocket $($up$/$down$)?$ How do you know?

g$.$ How is the instantaneous velocity changing in the interval $(1,64)t=10\mathrm{.}4(does$ the instantaneous velocity increases $or$ decreases $on$ the interval$)?$ Please note that $(1,64)is$ the vertex.

What $is$ the instantaneous velocity $att=1?$