1 Department of Information Technology, Faculty of Accounting and Informatics, Durban University of Technology, P O Box 1334, Durban, 4000, South Africa.
2 Department of Computer Science, Faculty of Science and Engineering, University of Eswatini (formerly Swaziland), Kingdom of Eswatini.
3 Department of Public Health Medicine, School of Nursing and Public Health, University of KwaZulu-Natal, Durban, 4001, South Africa.