Praia is the capital of which country?

Luanda is the capital of which country? Gaborone is the capital of which country? Ouagadougou is the capital of which country? Yaoundé is the capital of which country? Bangui is the capital of which country? N'Djamena is the capital of which country? Kinshasa is the capital of which country? Brazzaville is the capital of which country?