International Journal of Physical Sciences 1992-1950 Academic Journals 10.5897/IJPS2021.4962 Zinabu Tebeje * E-mail: Zinabut@yahoo.com 2022 31 01 2022 01 09 2021 07 10 2021 17 1 23 31 This is an open-access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://politicalwaffle.uk/journal/IJPS/article-abstract/109C8A568716 The full text article is available as a PDF file from http://politicalwaffle.uk/journal/IJPS/article-full-text-pdf/109C8A568716 1 2 3 4 5 6 7 8 9 10 11 12