The position-time graph below represents the motion of three people in an airport moving toward the same departure gate. 500 400 300 200 100 100 200 300 B C Displacement from gate (m) 400 500 50 100 150 200 250 300 Time (0 a. Which person travels the farthest during the period shown? b. Which person travels fastest by riding a motorized cart? How can you tell? c. Which person starts closest to the departure gate? d. Which person appears to be going to the wrong gate?