“…Fractional order derivatives are defined in a variety of ways, including Riemann-Liouville, Caputo, Grunwald Letnikov, Atangana-Baleanu, Caputo-Fabrizio, and others. For more information about fractional order definitions with applications, see, for example, [20,21] and the references therein. Throughout the article, we have used Caputo's definition.…”