What is the world's largest freshwater lake by surface area?

What is the largest lake in the European part of Russia? Which lake is the largest in Scandinavia? Which lake is the largest in the Ethiopian Highlands? Which lake is the largest in the Caucasus? Which of the Great Lakes is the deepest? In which country is Lake Baikal located? Which of the following lakes is the highest navigable lake in the world? What is the name of the largest freshwater lake in Africa?