in this question I'm stuck on the first part of it

4. In a survey of 703 randomly selected workers, 15.93% got their jobs through newspaper ads (based on data from Taylor Nelson Sofres Intereach). Consider a hypothesis test that uses a 0.05 significance level to test the claim that less than 20% of . workers get their jobs through newspapers ads. (3 points) a. What is the test statistic? 2 = P - P Pq n (2 points) b. What is the critical value? (2 points) c. What is the P- value? (3 points) d. What is the conclusion