student wanted to drive from Austin to San

Question

Antonio, 80 miles south of Austin on highway
I35. Unfortunately, he entered the highway in
the wrong direction and drove all the way to
Waco — 100 miles north of Austin — before
he noticed his error. In Waco, he turned
around, drove back to Austin and continued
to San Antonio. The whole trip took 4.29 h.
What was the student’s average speed during this trip?
Answer in units of mph
011 (part 2 of 2) 10.0 points
What was the student’s average velocity
during his trip? Take your positive direction
to be southbound on I35.
Answer in units of mph