All journals published by Open Journals Nigeria (OJN) are published under the Open Access Model, permitting any users to read, download, copy, distribute, print, search, or link to the full texts of its articles and to use them for any other lawful purpose. Therefore, all authors must agree on submission to have their published article available online and offline in the Open Access Mode. All the articles published in this journal are free to access immediately from the date of publication. We do not charge any fees for any reader to download articles for their own scholarly use.