1. Department of Mathematics, Physics and Computing, Moi University, P. O Box 3900-30100, Eldoret, Kenya
2. Bahir Energy Center and Department of Physics, Bahir Dar University, Ethiopia
3. Department of Chemistry, Moi University, P. O. Box 3900-30100, Eldoret, Kenya
4. Department of Chemistry, Kisii University, P. O. Box 408-40200, Kisii, Kenya
5. Department of Physics, Nile University of Nigeria, Nigeria
6. Department of Theoretical and Applied Physics, African University of Science and Technology, Nigeria
7. Centre for Cyber-Physical Food, Energy and Water Systems (CCP-FEWS), Electrical and Electronic Engineering Science, University of Johannesburg, Johannesburg, South Africa
8. CEMHTI-CNRS UPR3079, France