Debra is the day-shift supervisor at a company that manufactures and supplies plastic bottles to pharmaceutical companies. She is responsible for estimating the hiring needs for the day-shift at the factory. She also prepares the schedules for the training process of newly hired employees. Most importantly, she overlooks the entire day-shift production process at the factory and reports to her manager on a regular basis. In this scenario, debra is most likely a _____. Middle manager team leader first-line manager top manager