The table shows the relationship between the participants walking and running for the week's cross-country practices.
 Walk (laps) 3 B 15
 Run (laps) 5 10 D
 Total (laps) A C 40
 At this rate, how many laps will the participants walk if the total distance is 24 miles? How many miles will they run?
 They will walk 7 laps and run 17 laps for a total of 24 miles.
 They will walk 15 laps and run 9 laps for a total of 24 miles.
 They will walk 9 laps and run 15 laps for a total of 24 miles.
 They will walk 6 laps and run 18 laps for a total of 24 miles.