Answer: Marcus's mistakes were: 1) he was casually dressed. 2) no prior preparedness.
Explanation: To interview someone for any article one intends to write,one must:
1) have sent out a notice to the person to be interviewed.
2) be formally dressed.
3) do your research on the person.
4) write down objective for the interview.
5) lead with a 'soft ball' question.
6) ask open ended questions.
7) ask a reflection questions
8) write down and ask questions you know the answers to.
9) ask questions that elicit an emotional response.