set definition file for each grouping set, that is, sets whose names begin with topic- or theory-. Change each source-file prefix to source_file = pre-cal-diagnostic-quiz/
grouping set subdirectories containing the .pg files
Update README.md to include Diagnostic-Quiz-Question in description.
Create Diagnostic-Quiz-Questions directory.
Create Pre-Calculus subdirectory containing:
Update README.md to include Diagnostic-Quiz-Question in description.