“…Indeed, the applications of FDEs are not limited to the theory of control, but they have been proposed in studying biomathematics [192], diabetes mellitus [193], [194], cerebrospinal fluid pressure [126], hydrologic process [195], water movement in a horizontal column [196], epidemic model [197], population growth model [82], [98], Newton's law of cooling [72], electric circuits [72], [198], and the brain tumor [199]. Moreover, some of the other proposed applications of FDEs can be found in [200] for a predatorprey model, in [201] for production inventory model, in [72] for an economical investment, and in [202] for oil palm frond. For further applications of FDEs refer to [203]- [205].…”