In "Letter from Birmingham Jail" by Dr. King, how many paragraphs constitute the introduction, middle, and conclusion?

I think that the number of paragraphs is going to be a
relative concept.  With the transmission of speeches and writings to the web, strict
paragraphing entirely followed.  We can trace the structure of Dr. King’s letter in
specific terms, though.  The introduction to the letter consists of the opening address
to whom King refers in the assertion that King and his followers’ actions were “unwise
and untimely.”  In reference to other organizations, the introduction comes to a close. 
I would say that the middle begins with the idea that Dr. King is in “Birmingham because
injustice is here.”  This helps to launch him into an explanation of the cause and the
need to fight for social justice.  This “middle” goes on for quite a bit.  For my bet,
the conclusion of the letter begins with the simple sentence, “I must close now,” as Dr.
King concludes in demanding that all members of society- White and Black- fully heed the
call for social equity and to hear the cries of others’ sufferings in making Southern
society, and in turn all of America, recognize its promises and possibilities in
creating a system of equal treatment for all.