Question

please help!
A teacher promised a movie day to the class that did better, on average, on their test. The box plot shows the results of the test.

box plot labeled 2nd period with min at 77, Q1 at 78, median at 89, Q3 at 92, max at 100. Box plot labeled 4th period with min at 72, Q1 at 82.5, median at 89, Q3 at 96, max at 97.5

Which class should get the reward and why?