1. Department of Mathematics, College of Sciences, Umm Al-Qura University, P. O. Box 14035, Holly Makkah 21955, Saudi Arabia
2. Preparatory Institute of Engineering Study of Sfax, Department of Mathematics, University of Sfax, Road of Menzel Chaker Km 0.5 3000 Sfax, Tunisia
3. Laboratoire de Mathématiques, IECL, UMR, CNRS, Université de Lorraine, 7502, 3 rue Augustin Fresnel, BP 45112, F-57073 Metz Cedex 03, France
4. IRIMAS-Département de Mathématiques, Université de Haute Alsace, 18, rue des, Frères Lumière F-68093 Mulhouse, France