A 308 g bullet moving at 290ms enters and stops in an

Question

Solve the all parts of given problem:

Problem: A 3.08 g bullet moving at 290m/s enters and stops in an initially stationary 3.30 kg wooden block on a horizontal frictionless surface.

Part I: What's the speed of the bullet/ block combination?

Part II: What fraction of the bullet's kinetic energy was lost in this perfectly inelastic collision?

Part III: How much work was done in stopping the bullet?

Part IV: If the bullet penetrated 5.00 cm into the wood, what was the average stopping force?

Please clarify the equations and steps are used to get the answer. Thanks!