need help in this

26. John is driving a van on a single-lane section of the Sea-to-Sky highway. In order to pass a bus he crosses the yellow line and speeds up to 126 km/h. At the same time, a truck is coming in the opposite direction with a speed of 90.0 km/h. When the two vehicles are 144 m apart, both drivers hit the brakes, which results in a constant deceleration of 6.00 m/s2 for both vehicles. A) Draw the v-t and x-t graphs to determine whether or not the two vehicles will collide. B) If the two vehicles collide, find their relative velocity at the instant of collision; if they don't collide, find the distance between the two vehicles after they have both come to a complete stop