After skidding down a snow-covered hill on the inner tube, Ashley is coasting across a level snowfield at a constant velocity of +2.5 m/s. Miranda runs after her at a velocity of +4.9 m/s and hops on the inner tube. Determine how fast do the two of them slide across the snow altogether on the inner tube? Ashley's mass is around 59 kg and Miranda's is 69 kg. Avoid the mass of the inner tube and any friction among the inner tube and the snow.