Find and read a research journal article in an area

Find and read a research journal article in an area of interest. Then, answer the following questions:

1. What is the population of interest?

2. Are there any missing elements or foreign elements included in the population?

3. What is the sample size?

4. What sampling technique did the author(s) utilize?

5. Is this the sampling technique you would have used?  Why or why not?