1. Department of Mathematics, Gomal University, Dera Ismail Khan 29050, Pakistan
2. Institut Supérieur d’Informatique et des Techniques de Communication, Université de Sousse, H. Sousse, Tunisia
3. Department of Mathematics and Applied Mathematics, Sefako Makgatho Health Sciences University, Ga-Rankuwa, South Africa
4. China Medical University Hospital, China Medical University, Taichung, 40402, Taiwan