Pham can work as many or as few hours as she wants atthe college bookstore for $9 per hour. But due to her hecticschedule, she has just15 hours per week that she can spend working at either the bookstore or other potential jobs. One potential job,at a caf, will payher $12 per hour for up to 6 hours per week. She has another job offer at a garage that will pay her $10 an hourfor up to 5 hours perweek. And she has a potential job at a daycare center that will pay her $8.50 per hour for as many hours as she canwork. If her goal is to maximize the amount of money she can makeeach week, how many hours will she work at the bookstore