Apuck on a horizontal, frictionless surface is attached to a string that passes through a...

Apuck on a horizontal, frictionless surface is attached to a string that passes through a hole in the surface, as shown in. As the puck rotates about the hole, the string is pulled downward, bringing the puck closer to the hole. During this process, do the puck’s (a) linear speed, (b) angular speed, and (c) angular momentum increase, decrease, or stay the same?

FIGURE