1. Department of Mathematics, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai 602 105, Tamil Nadu, India
2. Department of Mathematics, College of Engineering and Technology, Faculty of Engineering and Tevhnology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Kanchipuram, Chennai, Tamil Nadu 603203, India
3. Department of Mathematics and Statistics, International Islamic University Islamabad, Pakistan
4. Department of Mathematics, Taiz University, Taiz, Yeman
5. Department of Mathematics, Umm Al-Qura University, Faculty of Applied sciences, P.O. Box 14035, Holly Makkah 21955, Saudi Arabia; samansour@uqu.edu.sa; wfkallel@uqu.edu.sa
6. Université de Sousse, Institut Supérieur d'Informatique et des Techniques de Communication, H. Sousse 4000, Tunisia
7. China Medical University Hospital, China Medical University, Taichung 40402, Taiwan
8. Department of Mathematics and Applied Mathematics, Sefako Makgatho Health Sciences University, Ga-Rankuwa, South Africa