Part I

A golfer hits a ball, giving it a maximum height of 27 m. If the ball lands 129 m away at the level from which he hit it, how long does it take for the ball to reach maximum height.

Part II

A golfer hits a ball, giving it a maximum height of 30 m. If the ball lands 137 m away at the level from which he hit it, what was its initial velocity in the horizontal direction

If the golf ball has horizontal velocity of 9.6 m/s and vertical velocity of 1.7 m/s, what is the golf ball's resultant velocity?

Provide answer in m/s and round to the nearest one decimal place(Neglect air resistance.)