Which lake is the largest in the Caucasus?

Which lake is the largest in the African Great Lakes by volume? 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? What is the world's largest freshwater lake by surface area? 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?