3 questions, each answered from published authorities with the sources listed.
Photo by Vyacheslav Argenberg, via Wikimedia Commons, CC BY 4.0. Source: https://commons.wikimedia.org/wiki/File:Railay,_Krabi,_Palms,_Thailand.jpg. License: https://creativecommons.org/licenses/by/4.0/AuthorVyacheslav Argenberg · CC BY 4.0File source