18. A ball starts from rest and accelerates at 0.3 m/s² while moving down an inclined plane 6 m long. When it reaches the bottom, the ball rolls up another plane, where it comes to rest after moving 16 m on that plane.

(a) What is the speed of the ball at the bottom of the first plane?

[ Give your answer in m/s to the nearest 0.01 m/s ]

(b) During what time interval does the ball roll down the first plane?

[ Give your answer in m/s to the nearest 0.01 m/s ]

(c) What is the acceleration along the second plane?

[ Give your answer in m/s² to the nearest 0.01 m/s² ]

(d) What is the ball's speed when it travelled 8m along the second plane?

[ Give your answer in m/s to the nearest 0.01 m/s ]