<Li> President <Dl> <Dd> Salva Kiir Mayardit </Dd> </Dl> </Li> <Dl> <Dd> Salva Kiir Mayardit </Dd> </Dl> <Dd> Salva Kiir Mayardit </Dd> <Li> First Vice President <Dl> <Dd> Taban Deng Gai </Dd> </Dl> </Li>

Identify and explain the functions of key institutions of south sudan