In the figure here, a red car and a green car move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 211 m. If the red car has a constant velocity of 25.0 km/h, the cars pass each other at x = 44.9 m. On the other hand, if the red car has a constant velocity of 50.0 km/h, they pass each other at x = 76.5 m. What are
(a) the initial velocity and
(b) the (constant) acceleration of the green car? Include the signs.