1. School of Mathematics, Statistics and Computer Science, University of KwaZulu-Natal, Durban, South Africa
2. Department of Engineering Science, Bandırma Onyedi Eylül University, 10200 Bandırma, Balıkesir, Turkey
3. Department of Mathematics, University of Eswatini, Kwaluseni, Eswatini
4. Department of Mathematics and Applied Mathematics, Sefako Makgatho Health Sciences University, P.O. Box 94 Medunsa 0204, Pretoria, South Africa
5. Department of Mathematics, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia