So the lingering 4 on the 4th question is, "How would Paul Jellema and Katie McGregor have done in age-graded scoring?".
The answers please . . . McGregor,30, would have been fifth overall, scoring 894.1 with her 21:30.7. Jellema,23, would have checked in eighth with an 866.4 rating with his 19:26.9. Not quite the rest of the story, but more than you had before!