How should I (we) submit a solution for the competition?
Is there are limit to the number of people on a team for the competition?
No, your team can be any size.
Are computational models or interactive simulations considered as possible solutions?
Absolutely. The intent is to allow as much freedom as possible in the form of the solutions. However your model/simulation must be emailable to firstname.lastname@example.org and many email servers impose a file size limit of 10-20 MB on attachments, so please bear that in mind.