9) Joshua threw a ball that traveled on a parabolic path and then landed on the ground. Its flight is modeled
by the equation, h(t) = -5t² + 20t+ 0.4, where time, t, is in seconds and height, h, is in meters.
a) Determine the maximum height reached by the ball.
b) How long did it take to reach maximum height?
c) When will the ball hit the ground?