ethical dilemmas

There are two of the following qualitative research methods, discuss their strengths and limitations, pointing out issues of reliability and issues of potential bias and and/or ethical dilemmas.

1- Unstructured interviews.
2- Semi-structured focus groups.

the essay should follows:
introduction about both methods and improve some example of it.
talking about the advantages and disadvantages of the methods.
shows some articles for example to show how these methods working.
shows some projects that using the both methods.
conclusion.

These methods should talking and using in the same area of communication in media not in example in pharmacy or another area. In the beginning of each paragraph it should write the topic sentence as a question. in the end the references should be academic resources not from wikipedia,etc and the plagiarism should not be more 10%.