Just after he catches the ball with his arm extended horizontally, what is the player's angular speed about a vertical axis through his head and feet, assuming that he was stationary at the instant he caught it?

To make the calculations reasonable, you can model the player's body as a uniform solid cylinder of mass 73.0 and diameter 35.0 and his arms as thin 6.00 rods, each 70.0 long, pivoting around a vertical axis through his center.

Please help me with this homework problem someone! I believe this deals with conservation of angular momentum but please help me out on how to work this out. Thank you sooo much for you help!