In the figure a 10 g bullet moving directly upward

In Fig. 9-59, a 10 g bullet moving directly upward at 1000 m/s strikes and passes through the center of mass of a 5.0 kg block initially at rest. The bullet emerges from the block moving directly upward at 400 m/s. To what maximum height does the block then rise above its initial position?

[ptyptypty]

I think I heard a Child come in and tell Daddy how to do the problem!! lol Nicely done.. Great video, as always!!