A sling is a weapon where a stone is whirled in a circle at high speed and released. A hunter is swinging a stone of mass 61g in a radius of 84 cm with an angular speed of 86 rpm. He quickly pulls inward on the string and reduces the radius of motion to 51 cm. You can treat the stone as a point mass for the purposes of calculating rotational inertia. What is the angular velocity of the stone right after the hunter has reduced the radius?