Sally travels by car from one city to another. She drives for 26.0 min at 81.0 km/h, 46.0 min at 30.0 km/h, and 46.0 min at 52.0 km/h, and she spends 11.0 min eating lunch and buying gas.
a) Determine the average speed for the trip.

(b) Determine the total distance traveled.