What is the total number of people who visited the art museum in January?
28 + 59 + 15 = 102. A total of 102 people visited the art museum in January.
What is the number of adults who visited the art museum in February?
139 - 22 - 34 = 83. 83 adults visited the museum in February.
Compared to January, how many more children visited the museum in February?
34 - 28 = 6. Compared to January, 6 more children visited the museum in February.