Need help with all parts!

An icc skater is spinning at 0.8 mw's and has a moment of inertia of 0.2.? kg - m2. - a 33% Part (:1) Calculate the angular momentum, in kilogram meters squared per second, of the ice skater spinning at 6.8 rev/s. - a 33" 0 Part (b) He reduces his rate of rotation by extending his arms and increasing his moment of inertia. Find the value of his moment of inertia (in kilogram meters squared) if his rate n.- of rotation decreases to I. J rev/s. a 33% Part (c) Suppose instead he keeps his arms in and allows friction of the ice to slow him- to 3. ,75 rev/s. What is the magnitude of the average torque that was exerted, in N - m, if this takes 18 s? fave = E l