Following dot diagram shows the motion of two bicyclists traveling along a straight line, for five seconds

Following dot diagram shows the motion of two bicyclists traveling along a straight line, for five seconds. Assume that positive direction for the position axis is to the right.
-Construct a position vs time graph for both bicyclists on the same set of axes. 
-Construct a velocity vs time graph for both bicyclists on the same set of axes. 
-Do the bicyclists ever have the same speed during the five seconds? If so, between which two clock readings does this happen and how do you know? If not, how do you know?