how do they pick the confederations cup teams
2017 FIFA Confederations Cup The eight competing teams were the host nation, the reigning FIFA World Cup champions, and the six holders of the FIFA confederation championships. If any team qualified for multiple berths (such as, if the World Cup champions also won their continental championship), the next best-placed team from their continental championship would have qualified.
2018 FIFA World Cup qualification (AFC) The following five teams from AFC qualified for the final tournament.