Two wooden pucks approach each other on an ice rink as shown in the figure. Puck #2 has an initial speed of 4.64 m/s and a mass that is some fraction  f = 2/3  that of puck #1. Puck #1 is made of a hard wood and puck #2 is made of a very soft wood. As a result, when they collide, puck #1 makes a dent in puck #2 and 12.2% of the initial kinetic energy of the two pucks is lost. Before the collision, the two pucks approach each other in such a manner their momentums are of equal magnitude and opposite directions. Determine the speed of the two pucks after the collision.

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