On average, both arms and hands together account for 13% of a person’s mass, while the head is 7.0% and the trunk and legs account for 80%. we can model a spinning skater with his arms outstretched as a vertical cylinder (head + trunk + legs) with two solid uniform rods (arms + hands) extended horizontally. suppose a 61.0-kg skater is 1.80 m tall, has arms that are each 70.0 cm long (including the hands), and a trunk that can be modeled as being 35.0 cm in diameter. the skater is initially spinning at 70.0 rpm with his arms outstretched. what will his angular velocity be (in rpm) when he pulls in his arms until they are at his sides parallel to his trunk?