Answer
Yes, Lefty has an incentive
Work Step by Step
People do not want to walk more than 1/4 mile. Therefore, when placed at 1/4 mile, all the customers from 0 to 1/4 mile will buy from him, plus a part of the customers from 1/4 to 1/2 mile.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.