Need help please

A silver dollar is dropped from the top of a building that is 1317 feet tall. Use the position function below for free-falling objects. s(t) = -16tz+ vit+ so (a) Determine the position and velocity functions for the coin. s (t ) = -161~ + 1371 X v (t) = -32t (b) Determine the average velocity on the interval [2, 3]. - 80 ft/s (c) Find the instantaneous velocities when t = 2 seconds and t = 3 seconds. v(2) = ft/s V(3) = -96 ft/s (d) Find the time required for the coin to reach the ground level. (Round your answer to three decimal places.) t = 9.273 X s (e) Find the velocity of the coin at impact. (Round your answer to three decimal places.) -296.7 X ft/s