A ball with $I=\frac{2M{R}^2}{5},$ is released from rest at the top of an incline of height, $H$ at an angle, $.$ There is no friction between the ball and the surface of the incline.

$3.$ What is the acceleration of the ball as it slides down the incline?

A$.\frac{g}{2}$

B$.$ gsin$$

C$.2$gcos$$

D$.gsi{n}^2$

$4.$ What is the velocity of the ball at the bottom of the incline?

A$.2gH$

B$.gH$

C$.4$gHsin$$

D$.\sqrt[\phantom{2}]{2gH}$