Bumps on a Track

QUESTION:

Two smooth tracks of equal length have "bumps" of the same curvature. The only difference is that A bumps ^up and B bumps _down.

drawing of balls on two tracks with bumps

If two balls start simultaneously with the same initial speed, the ball to complete the journey first is

Ball A.
Ball B.
both balls take the same time.

EXTRA:

If the initial speed = 2 m/s and the speed of the ball at the bottom of the curve on Track B is 3 m/s, then the speed of the ball at the top of the curve on Track A is

1 m/s.
> 1 m/s.
< 1 m/s.

For help with this question, see Conceptual Physics, Chapter 8.

Check your answers.