Hi Laura and all,
Monica has nicely summarized the input from me and François (the other TA) with her own responses.
I just wished to add a further general clarification on this question - on q6, we ask for 1 figure, though we recognize that there are actually several specific questions the authors investigated, each which may have a different diagram. In your answer(s), please be clear about which specific question you chose to diagram, by defining the exposure and outcome, and timing in your explanation.
thanks,
June