A jogger runs along a straight and level road for a distance of 5.0 km and then runs back to her starting point. It took the jogger 2.0 hrs to complete the round trip. For the round trip, which one of the following statements is true?
[a] Her average speed is 5.0km/hr and her average velocity is 5.0km/hr.
[b] Her average speed is 5.0km/hr and her average velocity is 0.0km/hr.
[c] Her average speed is 0.0km/hr and her average velocity is 0.0km/hr.