One of your classmates, Madison, is a hardworking student, is serious about her classes, and is conscientious about her grades. Madison is also involved, however, in volunteer activities and an extracurricular sport. If Madison's goal is to get good grades, what is her opportunity cost when she is involved in other activities? If Madison's goal is to be involved in volunteer activities and sports, what is her opportunity cost when she spends her time studying?

Elaborate and explain min 250 words