You are considering how much to study for your microeconomics exam at the end of the week, but all you care about is your upcoming spring break trip to Florida. Fortunately, your parents have offered to contribute $4 toward the cost of your trip for every point you get on the exam. You estimate that with H hours of studying, your parents' contribution (your total benefit from studying) will be B(H) = 40H - H2. This implies that your marginal benefit with H hours of studying is MB(H) = 40 - 2H.But you can also earn $20 per hour working at your pizza delivery job, so your total cost for studying H hours, due to lost wages, is C(H) = 20H,which implies that your marginal cost is MC(H) = 20. How many hours should you spend studying for your exam to maximize the funds you have available for your trip?