A cue ball of mass ml 0.365 kg is shot at another billiard ball, with mass m2 055 kg, which is at rest. The cue ball has an initial speed of v = 8.5 m/s in the positive direction. Assume that the collision is elastic and exactly head-on. ? 25% Part (a) write an expression for the horizontal component of the billiard ball's velocity, vr after the collision, in terms of the other variables of the problem. -& 25% Part (b) what is this velocity, in meters per second? 25% Part (c) Write an expression for the horizontal component of the cue ball's velocity, vr, after the collision. 25% Part (d) what is the horizontal component of the cue ball's final velocity, in meters per second?