1. Department of Mathematics and Statistics, Riphah International University, Islamabad 44000, Pakistan
2. Université de Sousse, Institut Supérieur d’Informatique et des Techniques de Communication, Sousse 4000, Tunisia
3. China Medical University Hospital, China Medical University, Taichung 40402, Taiwan
4. Department of Mathematics, COMSATS University Islamabad, Attock Campus, Attock, Pakistan
5. Department of Mathematics, International Islamic University Islamabad, Islamabad, Pakistan
6. Institute of Research and Development of Processes IIDP, University of the Basque Country, Campus of Leioa, P.O. Box 48940, Leioa 48940, Bizkaia, Spain