A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the first part, she rides for 23.7 minutes at an average speed of 6.31 m/s. During the second part, she rides for 25.0 minutes at an average speed of 4.12 m/s. Finally, during the third part, she rides for 14.6 minutes at an average speed of 15.7 m/s. (a) How far has the bicyclist traveled during the entire trip? (b) What is the average speed of the bicyclist for the trip?