5 A child's toy launches toy rockets into the air. The height, I m. of a toy rocket which islaunched into the air with an initial velocity of v. and initial height of h can be modelled by the function h(1) = h + v (1) -4.912, where t is time in seconds that have passed since the rocket was launched. A toy rocket is launched from the ground with an initial velocity of 50 m s . Find the maximum height the rocket reaches, and the time that passes before it hits the ground again