5000 characters to list job responsibility?

Hi all,

I am applying to the Said Business School - Fall 2014 program. As I am getting my application together, I have a question about the "Please list your main responsibilities, your most significant challenge and your greatest achievement. (5000 characters) " section under "You at Work". Though the question says "List", I am not sure whether the responsibilities, challenge and achievement should each be a bulleted list or should I write this like the other essays (story format).

Any guidance would be greatly appreciated.

Thanks so much!