Rotation of phonograph records The two common 'types of phonograph records, LP a...

Rotation of phonograph records The two common 'types of phonograph records, LP albums and singles, have diameters of 12 inches and 7 inches, respectively. The album rotates at a rate of rpm, and the single rotates at 45 rpm.

(a) Find the angular speed (in radians per minute) of the album and of the single.

(b) Find the linear speed (in ft/min) of a point on the circumference of the album and of the single.