Resumen
University affiliations for first author (Adebiyi, Sulaimon Olanrewaju) and third author (Amole, Bilqis Bolanle) were changed. The numbering for Literature Review section was changed from 1 to 2. Accordingly, numbering of all future (next) sections was adjusted. Corrections to figures and tables were made. Table 2.1 is now numbered 1, Figure 2.1 is numbered Figure 1, Figure 1 is numbered Figure 2, Table 4.1 is numbered Table 2, Figure 4.1 is numbered Figure 3, Table 4.2 is numbered Table 3 and Figure 4.2 is numbered Figure 4. A duplicated reference to Adeleke, A and Aminu S.A. (2012) on page 19 was removed. The original article can be found via the DOI http://dx.doi.org/10.5195/emaj.2016.101