<Tr> <Th> Monarch </Th> <Td> Elizabeth II, Queen of Australia Since 6 February 1952 </Td> </Tr> <Tr> <Th> Governor - General </Th> <Td> His Excellency General the Hon . Sir Peter Cosgrove AK, MC Since 28 March 2014 </Td> </Tr> <Tr> <Th> President of the Senate </Th> <Td> Senator The Hon . Scott Ryan, Liberal Since 13 November 2017 </Td> </Tr> <Tr> <Th> Speaker of the House of Representatives </Th> <Td> The Hon . Tony Smith MP, Liberal Since 10 August 2015 </Td> </Tr>

What are the roles of the federal government in australia