Austin and Undra II Mack are two young entrepreneur brothers from Detroit. They're 13 and 14 years old, respectively, and are already CEOs of three growing companies: Mack Bros. Lawn Service, Picture to Pitcher Books and APPly IT. To inspire youth to explore entrepreneurship, the two have published a children’s book on their lawn service. They hope that through their services and books, more youth become engaged in entrepreneurship.