Add to ORKGI, Muzomuhle Bhengu, hereby declare that this thesis in its entirety is my original work and I am the sole author. All sources consulted have been acknowledged and accurately referenced, and were only utilised to fulfil the purpose of this study. I also declare that this thesis or parts thereof have not been previously submmited to any other university for the purpose of obtaining an academic degree. Stellenbosch University holds the reproduction and publication rights and the rights held on this thesis will not in any form infringe any third party from making reference to this thesis