Rwanda is a country located in Central Africa. It borders Burundi, Democratic Republic of the Congo, Tanzania, and Uganda. Rwanda is landlocked other than its western border of Lake Kivu. The government system is a republic; the chief of state is the president, and the head of government is the prime minister. Although much of the economy relies on subsistence farming, Rwanda has a mixed economic system in which there is a variety of private freedom, combined with centralized economic planning and government regulation. Rwanda is a member of the Common Market for Eastern and Southern Africa (COMESA) and the East African Community (EAC).