In Figure, a 1.0 g bullet is fired into a 0.50 kg block attached to the end

Question:

In Figure, a 1.0 g bullet is fired into a 0.50 kg block attached to the end of a 0.60 m non uniform rod of mass 0.50 kg. The block-rod-bullet system then rotates in the plane of the figure, about a fixed axis at A. The rotational inertia of the rod alone about that axis at A is 0.060 kg ? m2 Treat the block particle(a) What then is the rotational inertia of the block-rod-bullet system about point A?(b) If the angular speed of the system about A just after impact is 4.5 rad/s, what is the bullet's speed just before impact?