1,2,3 answer your question
They traded with them selves.
Their civilization has never paused, or changed. They still have their old cultures (sort of) They still have the same language.
in this case, Kai should highlight his cooperation skills, such as When a member of Kai's group fell behind, he helped her so the group would finish on schedule.
For interviewers ability to work in a team is extremely important since since companies tend to be separated into different departements whose function is correlated with one another. Helping others who is experiencing indicates that you are a team players and a valuable asset to the team.
