Rolling Friction

A ball rests upon a flat piece of paper on a table top. The paper is pulled horizontally but quickly towards right as shown. Relative to its initial position with respect to the table, the ball
I. Remains stationary if there is no friction between the paper and the ball.
II. Moves to the left and starts rolling backwards, i.e. to the left if there is a friction between the paper and the ball.
III. Moves forward, i.e., in the direction in which the paper is pulled.
Here, the correct statements is/are

The ratio of the time taken by a solid sphere and that taken by a disc of the same mass and radius to roll down a rough inclined plane from rest from the same height is

A homogeneous ball is placed on an inclined plane of inclination $\mathrm{\theta }.$ At what values of the coefficient of friction $\mu$ will the ball roll down the plane without slipping :-

Which of the following statements is not true

Rolling friction is?

A ball rolling along the ground gradually slows down and finally comes to rest,