1. Department of Mathematics, Islamia College Peshawar, Peshawar, Pakistan
2. Department of Mathematics, University of Malakand, Dir Lower, Chakdara, Pakistan
3. Université de Sousse, Institut Supérieur d’Informatique et des Techniques de Communication, H. Sousse 4000, Tunisia
4. Department of Mathematics and Applied Mathematics, Sefako Makgatho Health Sciences University, Ga-Rankuwa, South Africa
5. China Medical University Hospital, China Medical University, Taichung 40402, Taiwan
6. College of Business Administration-Finance Department, Dar Al Uloom University, Riyadh, Saudi Arabia