In the diagram below, point A is southwest of point B. Jaleh walks for 400 seconds along path 1, going from point A to point B. She then runs for 100 seconds from point B back to point A, following path 3. What is Jaleh's velocity for the first part of her trip? (Remember that velocity is calculated using displacement and time.)
A. 0 m/s
B. 0.5 m/s northeast
C. 1.4 m/s southwest
D. 1 m/s northeast

