problem 6.2 function m files

i am having trouble figuring out this problem can anyone help its in the 4th edition?

[the cyclist]

You have provided absurdly too little information for us to help you.

Please read this and try again: http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer