In short: 13-year-old Queensland skateboarder Arisa Trew is on-track to become Australia's youngest Olympic medallist, a feat set by Sandra Morgan-Beavis in 1956. 13-year-old Queensland skateboarder Arisa Trew is on-track to become Australia's youngest Olympic medallist, a feat set by Sandra Morgan-Beavis in 1956. Australia's 1956 Olympics 4x100m freestyle gold medal winning team, inlcuding Sandra Morgan-Beavis, Dawn Fraser, Lorraine Crapp …