At the most recent comic-con, 100 people were surveyed about what comics they liked. there are 44 people who liked the batman, 51 people who liked spiderman, and 39 people who liked hulk. there are five people who only liked the batman and spiderman; four people who only liked both spiderman and hulk; and three people who only liked the batman and hulk. 28 people liked all three. how many people surveyed did not like any of the characters listed?