What is the sphere's angular velocity at the bottom of the incline?

A 7.2 cm diameter, 320 g solid sphere is released from rest at the top of a 1.70 m long, 19.0∘ incline. It rolls, without slipping, to the bottom.

Part A
What is the sphere’s angular velocity at the bottom of the incline?

Part B
What fraction of its kinetic energy is rotational?