[填空题]
(a) What is the angular momentum of a figuka x 593tdsasls2-ug;re skater spinning a,w ,txn cqt+1zt 3.5 with arms in close to her body, assuming her to be a uniform cylinder with a height of 1.5 m, a radius of 15 cm, and a mass of 55 kg? (b) How much torque is required to slow her to a stop in 5.0 s, assuming she does not move her arms?