In your email to your blogger, I suggest some form of the following:
I'm a senior (major) student at the University of Central Oklahoma studying
blogging in media.
For my class assignment, want to report on your blog and would appreciate it if
you could answer a few questions for me.
I have a few questions I'd like to ask you, and your answers are vital to
my class presentation later this semester. The questons I'd like to ask
follow. Would it be possible to have your answers by (date)?
Please let me know by (date) if you can do this.
Thank you very much,