Help please....

A pet store surveyed 337 people to see how many own a cat and how many own a bird. The Venn diagram below shows the results. (Each number gives the number of people who fall into that Venn diagram category.) (a) How many of the people own a cat? I] people (b) How many of the people own neither a cat nor a bird? [I people (c) How many of the people do not own both a cat and a bird? [I people