In 2021, detailed collaborative archaeological work was published regarding the use of Cloggs Cave, near Buchan in East Gippsland, Victoria. (If you're interested, you can read about it in The Conversation or the research article. Links embedded in underlined text.) One of the findings (simplified) was that the Main Chamber of the cave contained human artefacts at least 19,000 years old. You may assume that, in living organisms, carbon-14 is constantly replenished, but after an organism dies, the carbon-14 decays with a half-life of 5,730 years. For organic material associated with artefacts 19,000 years old, what fraction of carbon-14 atoms would remain? Give your answer to 3 significant figures