Suppose you have midterms in economics and astronomy tomorrow, and you only have four hours left to study. The accompanying table provides the combinations of time spent studying economics and astronomy and your expected exam scores. Draw a production possibilities frontier to illustrate your study options

Hours spent Economics Op cost of Op cost of Hours spent studying Exam Score more Econ. studying Astronomy more Astron. exam score Economics Astronomy 0 60 92 80 3 90 90 87 95 83 98 O 70