1. Department of Mathematics & Statistics, The University of Lahore, Lahore, Pakistan
2. Yildiz Technical University, Faculty of Arts and Science, Department of Mathematics, Esenler, 34210 Istanbul, Turkey
3. Quantum Leap Africa (QLA), AIMS Rwanda Centre, Remera Sector KN 3, Kigali, Rwanda
4. African Center for Advanced Studies, P.O. Box 4477, Yaounde, Cameroon
5. Institut de Mathematiques et de Sciences Physiques (IMSP/UAC), Laboratoire de Topologie Fondamentale, Computationnelle et leurs Applications (Lab-ToFoCApp), BP 613, Porto-Novo, Benin
6. Université de Sousse, Institut Supérieur d’Informatique et des Techniques de Communication, H. Sousse 4000, Tunisia
7. Department of Mathematics and Applied Mathematics, Sefako Makgatho Health Sciences University, Ga-Rankuwa, South Africa
8. China Medical University Hospital, China Medical University, Taichung 40402, Taiwan
9. Department of Mathematics, Government Postgraduate College, Abbottabad, Pakistan
10. Department of Mathematics, Jazan University, Jazan, Saudi Arabia