Do they give you the key selection criteria.

Generally speaking you can use 'real life' examples to show them how you meet criteria. Leadership can be shown by organising a group activity and getting others to all contribute, trouble shooting can be when you have been able to find a workaround to a problem at home or with travel. Group participation can be explained by discussing a conflict and how it was directed to a compromise..... It might be a little more creative but think about what 'skill' they are actually asking you to demonstrate and you should be able to find an example!

Goodluck