Use the table to answer the following questions.
The marginal, or additional, gain from Bella’s second hour spent working, from 8:00 AM to 9:00 AM, isproblems.
The marginal gain from Bella’s fourth hour spent working, from 10:00 AM to 11:00 AM, isproblems.
The following week, Bella’s econometrics faculty advisor gives her some advice. In all their years of teaching they claim to observe that working on 70 multiple choice questions boosts a student’s test score by about the same amount as spending an hour reviewing lecture notes. For simplicity, assume students are able to review lecture notes at a constant pace during each hour spent studying.
Given this information, in order to use her 4 hours of time spent studying to get the highest possible test score, how many hours should she have spent solving multiple choice problems, and how many hours should she have spent reviewing lecture notes?

0 hours working on problems, 4 hours reading
1 hour working on problems, 3 hours reading
2 hours working on problems, 2 hours reading
4 hours working on problems, 0 hours reading