Please show work.

Problem 5 and 6: The height in meters of a projectile shot upward from a point 2 m above the ground level with an initial velocity of 24.5m/s after & seconds is given by, h(z) =2+ 24.5t - 4.9t2. (a) Find the velocity function and then give the velocity after 2 s and after 4 s. (b) When does the projectile reach its maximum height? (c) What is the maximum height? (d) When does the projectile hit the ground? (e) With what velocity does the projectile hit the ground