Negera Desta, Geremu; Wogi, (PhD) Lemma; Kidanu, (PhD) Selamyehun
(Haramaya university, 2020-10)
First and foremost, all acclamation and thanks goes to Almighty God, the Lord of all things and Master of the Day of Judgment who has been helping me in every aspect of my life, including this thesis work.
Furthermore, I ...