A science student is riding on a flatcar of a train traveling along a straight horizontal track at a constant speed of 9.0 m/s. The student throws a ball along a path that she judges to make an initial angle of 54.0° by the horizontal and to be in line with the track. The student's professor, who is standing on the ground nearby, observes the ball to rise straight up. How high does the ball rise?
a) 10.6 m b) 2.67 m c) 7.83 m d) 9.80 m