3. Why did Mary Ann Shadd Cary go on to become the second Black American woman in the U. S. to earn a law degree
after her accomplishments in publishing, education, and the
U. S. Army?
5. When did Mary and her brother go to Canada?
6. Why did Mary's parents send her to another state, Penn-
sylvania, to attend school?

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.