1. Materials Science Program, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa 1000, Ethiopia
2. Center for Environmental Science, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa 1000, Ethiopia
3. Center for Space Research, North-West University, Private Bag X6001, Potchefstroom 2531, South Africa
4. ICTP-East African Institute for Fundamental Research, Kigali City 00000, Rwanda
5. National Institute of Theoretical and Computational Sciences, Johannesburg 2000, South Africa