1. Mathematics Department, College of Science, King Khalid University, Abha 61413, Saudi Arabia
2. Symbiosis Institute of Technology, Pune Campus, Symbiosis International (Deemed University), Pune, India
3. Department of Natural and Exact Sciences, Universidad de la Costa, Calle 58, 55-66, Barranquilla 080002, Colombia
4. Section of Mathematics, International Telematic University Uninettuno, Corso Vittorio Emanuele Ⅱ, 39, Rome 00186, Italy