Sabrina, Ahmad, Miguel, and Amelia are all in the same science class. Each student has a different level of physical activity. Sabrina is a cyclist who goes for a ride several times a week. Ahmad enjoys taking long walks and hikes on the weekends. Miguel is a member of the school's track team and trains regularly. Amelia prefers to watch TV when she’s not doing schoolwork.Which student is most likely to have the lowest grade based on their level of physical activity?