(b) After 2.8 s the engine cuts out and for the remainder of its journey the rocket moves under the influence of gravity

[answerhappygod]

(b) After 2.8 s the engine cuts out and for the remainder of its
journey the rocket moves under the influence of gravity alone. The
vertical component of the rocket's velocity at the start of this
phase of its motion is 46.4 m 8-1
(i) Calculate the maximum height reached by the rocket. (ii) The
rocket's trajectory continues until it hits the ground. Sketch a
rough graph showing the rocket's kinetic energy against time, from
the moment at which the engine cuts out until the rocket hits the
ground.
Please solve this with in 1 hour