During the summer, cassandra’s parents allow her to work to earn some spending money. however, they do not want her to work more than 40 hours a week. she has two jobs lined up—a waitress position, which pays $10 per hour, and an office assistant position, which pays $11 per hour. while the waitress position does not pose a maximum number of hours she can work, the office limits her to, at most, 15 hours a week. which of the following is true about the hours cassandra can spend as a waitress (w) and as an office assistant (a) for a given week?