1. Department of Statistics and Operations Research, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia
2. ENSIIE, University of Evry-Val-d’Essonne, 1 Square de la Résistance, 91025 Évry-Courcouronnes Cedex, France
3. University of Sfax, Faculty of Sciences of Sfax, Department of Mathematics, Sfax, Tunisia