Hector went to the music store by heading due south at 3 m/s, then turning West and continuing at the same speed for another three blocks. Which of the following is true about Hector's velocity?
Hector's velocity did not change because his speed did not change.
Hector's velocity did not change because his directions did not change.
Hector's velocity changed because his direction changed.
Hector's velocity changed because his speed changed.