A 446 g croquet ball traveling at 0.355 m/s collides with a 462 g billiard ball traveling towards it at 0.720 km/hr. If the croquet ball is stationary after the collision, find the final velocity of the billiard ball, and amount of kinetic energy lost in the collision. (Hint: make sure you do a sign convention, write down all known and unknowns, convert to SI units, and write down any assumptions)