Which country uses the internet country code domain ".uk"?

Which country uses the internet country code domain ".sa"? Which country uses the internet country code domain ".ae"? Which country uses the internet country code domain ".pe"? Which country uses the internet country code domain ".ve"? Which country uses the internet country code domain ".it"? Which country uses the internet country code domain ".fm"? Which country's flag features a red maple leaf? Which country's flag features a green cedar tree?