https://en.wikipedia.org/wiki/2022_FIFA_World_Cup_knockout_stage

I will select as answers all the countries that make it to the Round of 16, independently of them placing first or second in their group.

Betting closes before the start of the final games of the group stage.

Notice that I will be selecting 16 teams as answers assigning 6.25% probability to each team. So you have to multiply probabilities here by 16 (6.25% means 100%) and divide possible profits by 16.