a school has third graders. the third grade teachers have planned a special treat for the last day of school and brought ice cream for their students. there are three flavors: mint chip, chocolate, and strawberry. suppose that students like (at least) mint chip, like chocolate, like strawberry, like mint chip and strawberry, like mint chip and chocolate, like chocolate and strawberry, and like all three flavors. how many students don't like any of the flavors available?