You indicated that the direction of the angular acceleration at point D is 8. If the axis of rotation of an object does not wobble, then the directions of the angular velocity and angular acceleration are either the same or opposite. In this program, you can assume that the axis of rotation of the ball never wobbles.

Also, when the ball is at point D, it is not rolling uphill or downhill. When this is true, does the ball either spin faster and faster or spin slower and slower?