The Three Matomo Tracking Scopes

OBSERVATION: When setting a custom variable with the PHP tracking client one has the option of selecting either of three scopes: visit, page, action.

QUESTION ONE: Is it safe to assume that setting the scope determines in which data table the variable is stored?

QUESTION TWO: If the answer to the above question is true, then I believe to have discovered the log tables for both visits (log_visit) and actions (log_link_visit_action). Unfortunately, I have not been able to discover the data table for the page. Where does this latter reside?