A squirrel falls from a very tall tree. Initially (at $t=0$ ), the squirrel is at the top of the tree, a distance $y=50$ m above the ground. At $t=1.0 \mathrm{s}$, the squirrel is at $y=45 \mathrm{m},$ and at $t=2.0 \mathrm{s}$ it is at
$y=30 \mathrm{m} .$ Estimate the average velocity of the squirrel during the intervals from $t=0.0 \mathrm{s}$ to $t=1.0 \mathrm{s}$
and from $t=1.0 \mathrm{s}$ to $t=2.0 \mathrm{s}$. Use these results to estimate the average acceleration of the squirrel during this time. (No squirrels were harmed during the writing of this problem.)