If my reaction time is .204 seconds, what are the distances for each of the 4 speeds listed? Or at least show me how to solve the 25 mph one so I can do the rest. Thank you very much!!!

The horizontal blue line through the middle of the lens is called the optical axis. as the lamp is moved above or below the axis, keeping the horizontal distance to the center of the lens constant, how does the horizontal distance from the lens to the image change?