Here’s an image of those teams! Xenofon and Imogen will help you get in touch with your teammates.
The instructions as a whole are here:
The instructions include a link to the form where you declare your 10k runner’s target time, here:
https://docs.google.com/forms/d/e/1FAIpQLSfLefbOGq77hwND9y6LDYokvRJd7CjCzmAZAEQLZJpstHGnSQ/viewform
Good luck!