A social researcher interested in racial attitudes in the state of North Carolina stands on the corner of Trade and Tryon Street and asks the 1st 100 people who walk by the following question: "Are you a racist?" 93 respondents answer "no"; 3 answer "yes"; and 4 decline to answer. From this, the research concludes that no more than 7% of the population are racist..

a. What type of sampling methodology what the researcher using? Convenience, cluster, stratified, simple random or systematic? Explain your answer.

b. List all flaws in the sampling methodology that the researcher is using (there are at least 2). Classify each flaw you find as "sampling bias" or "response bias".