Two pool balls of equal mass collide in a glancing hit. Before the collision, the cue ball is moving right at 3.0 m/s, and the 6-ball is stationary. After the collision, the cue-ball is deflected to move at 60 degrees counterclockwise from its original direction, at a speed of 1.5 m/s. 

a) What is the direction and speed of the 6-ball after the collision?

b) Does this collision appear to be elastic?