Rolling without Slipping

A sphere with mass 7kg and a diameter of 14cm is rolled down an inclined ramp, starting at rest, which makes an angle of $30^\circ$ with the horizontal. The incline has a height of 14m and has just enough friction so that the sphere rolls without slipping.

Remember that the moment of inertia for a sphere is 0.4m $r^2$ . Assume that g=9.8m/ $s^2$ . What is the linear speed (in m/s) of the sphere at the bottom of the incline? Submit your answer to 2 decimal places.