See where the velocity of A starts. This is the moment when car A starts.
See where it is for B.
You know that B starts 2 hours after A. So a graduation on the graph will correspond to 2 hours.
Car B travels on "two graduations", that is to say .. hours
Car A travels on "4 graduations", that is to say .. hours
This is the same for the maximum velocity. You know that the two can reach 44. But only one seems to reach it. So estimate to what speed corresponds a graduation on the graph.