A ball is dropped from a height of 144 feet above the ground. The position of the ball relative to the ground at time t is given by s (t) = 162'2 + 144 fort 2 0 . (The units of s are feet and the units of t are seconds.) a) What is the average velocity of the ball between I = 1.5 and t = 2.5? ft/sec ft/sec b) What is the average velocity of the ball between t = 1.9 and t = 2.1? ft/sec c) What is the average velocity of the ball between t = 1.99 and t = 2.01 ? d) What is your estimate for the velocity of the ball at t = 2 seconds? ft/sec W e) What is your estimate for the speed of the ball at t = 2 seconds? sec