A solid, uniform disk of radius 0.250m andn mas 55.0kg rolls down a ramp of length 4.50m that makes an angle of 25.0 degrees with the horizontal. the disk starts from rest from the top of the ramp. Find a. the speedd of the disk's center of mass when it reaches the bottom of the ramp and b. the angular speed of the disk at the bottom of the ramp.