Affiliation: | 1. Modeling Biomedical System Research Group, Department of Applied Mathematics , National University of Science and Technology , Bulawayo, Zimbabwe gmagombedze@gmail.com;3. Modeling Biomedical System Research Group, Department of Applied Mathematics , National University of Science and Technology , Bulawayo, Zimbabwe;4. Modeling Biomedical System Research Group, Department of Applied Biology , National University of Science and Technology , Bulawayo, Zimbabwe |