A solid sphere, disc and solid cylinder, all of the same mass, are allowed to roll down (from rest) on inclined plane, them

A solid sphere, disc solid cylinder all of the same mass and made of the same material are allowdd to roll down (from rest) on the inclined plane, then:

A solid sphere, solid cylinder and a disc are allowed to roll down from the top of an incline plane from the same height. Then

A disc, a solid sphere,a hollow sphere and a ring of the same mass and radius are allowed to silde down on an inclined plane.Which one reaches the bottom first?

If a solid sphere, disc and cylinder are allowed to roll down an inclined plane from the same height

'A' solid sphere and solid disc having the same mass and radius roll down on the same inclined plane. What is the ratio of their accelerations ?