| Institution: | 1. Department of Applied Mathematics, National University of Science and Technology, P.O. Box 939 Ascot, Bulawayo, Zimbawbwe;2. University of Juba, Department of Mathematics, P.O. Box 82 Juba, Central Equatoria, South Sudan;3. University of Zimbabwe, Department of Mathematics, P.O. Box MP 167, Harare, Zimbabwe;1. Department of Business Information Technology, Pamplin College of Business, Virginia Tech, Blacksburg, VA 24061, United States;2. College of Business, Valparaiso University, 1909 Chapel Drive, Valparaiso, IN 46383, United States |
