5.-(10 Points) An engine provides constant upward acceleration for a rocket,launched vertically. At the time the engine has exhausted all its fuel, the rocket has risen to 74 m and acquired a velocity of 50 m/s. The rocket continues to rise in unpowered flight, reaches maximum height, and falls back to ground. The rocket is launched fromground level, y=0, at t = 0s. Find а)The speed of the rocket upon impact on the ground b)The maximum height c)The total time the rocket is in unpowered flight. d)The acceleration at t= 3.1 s?

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