Answer: memo consists of two parts: the identifying information at the top, and the message itself. At the top, identify for whom the memo has been written, who is sending it, the subject, and the date. The subject line serves as the memo's title.
Explanation:
Dem/o -----> people ------> greek----> democracy --- government of the people; democraphic --- the study of people;
epidemic--- spreading among people in a region
I honestly havent read the book but it looks interesting so once i read it I can answer your question