A pronghorn antelope has been observed to run with a top speed of 97 km/h.
Suppose an antelope runs 1.5 km with an average speed of 85 km/h, and then runs 0.80 km with an average speed of 67 km/h.
a. How long will it take the antelope to run the entire 2.3 km?
b. What is the antelope’s average speed during this time?