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 s, the squirrel is at y - 45 m, and at t - 2.0 s it is at y - 30 m. Estimate the average velocity of the squirrel during the intervals from t - 0.0 s to t - 1.0 s and from t - 1.0 s to t - 2.0 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.)