A bicycle race in a sprint in which 2 riders participate. When Rider A is 500 meters from the finish line, Rider B is 25.0 m ahead of A, and they begin their final accelerations at this moment. Rider A accelerates at 0.5 m/s^2 for 15.0 s. Rider B accelerates at 0.4 m/s^2 for 16.0 s. Both riders maintain their final speeds until the end of the race. Which rider crosses the finish line first, and how far behind is the second rider?