Problem
Emily draws cartoons that she sells to her classmates. Her average product of labor is five cartoons per hour if she works for one hour, four per hour if she works for two hours, three per hour if she works for three hours, and two-and-a-half per hour if she works for four hours. What is her marginal product of labor at one, two, three, and four hours of work?
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.