You earn $10 per hour working as a manager at a grocery store. You are required to work at the grocery store at least 8 hours per week. You also teach music lessons for $15 per hour. You need to earn at least $120 per week, but you do not want to work more than 20 hours per week.

A. Write a system of linear inequalities that represent the situation.
B. identity and interpret a solution of the system.
C. Use a graph to determine whether you can work 8 hours at the grocery store and teach 1 hour of music lessons.