1. Department of Mathematics, College of Science & Arts, King Abdul-Aziz University , Rabigh , Saudi Arabia
2. Department of Mathematical Sciences, University of Lakki Marwat, Lakki Marwat 28420 , Khyber Pakhtunkhwa , Pakistan
3. Faculty of Engineering, Department of Industrial Machines and Equipments, “Lucian Blaga” University of Sibiu , 10 Victoriei Boulevard , Sibiu , Romania
4. Department of Mathematics, College of Science, Jazan University , Jazan , Saudi Arabia