A 3 kg object sitting at the top of the track shown is given an initial velocity of 4 m/s. Assuming that the track is perfectly frictionless between points A and C,a. The object is at the to of a hill where point A is, it is 12m high, the track goes down to 0, then back up a hill wear point b is, it is 6m high, C is at 0 at the bottom of hill B.Find the velocity of the object at point B.b. The track continues on horizontally after point C, but now has a coefficient of kinetic friction of 0.4. How far does the object travel after passing point C?