Collapsible of individual questions/answers
Only the FAQ categories are currently defined as collapsible sections on the FAQ page. Once you open a collapsible category all the questions and answers falling within that category are fully shown.
The questions and their accompanying answers within a collapsible category should be collapsible as well. This means that once you open a category you are shown all the questions as a collapsible, only after you click on a specific question will the answer be shown.