The height (in meters) of a projectile shot vertically upward from a point 2 m above ground level with an initial velocity of 25.5 m/s is h = 2 + 25.5t - 4.9t after t seconds. (a) Find the velocity (in m/s) after 2 seconds and after 4 seconds. v(2) = v(4) = (b) m/s m/s When does the projectile reach its maximum height? (Round your answer to two decimal places.) S (c) What is the maximum height? (Round your answer to two decimal places.) m (d) When does it hit the ground? (Round your answer to two decimal places.) S (e) with what velocity (in m/s) does it hit the ground? (Round your answer to two decimal places.) m/s