**Author details**

Motsa Sandile Sydney\* , Magagula Vusi Mpendulo, Goqo Sicelo Praisegod, Oyelakin Ibukun Sarah and Sibanda Precious

\*Address all correspondence to: sandilemotsa@gmail.com

School of Mathematics, Statistics & Computer Science, University of KwaZulu-Natal, Scottsville, Pietermaritzburg, South Africa
