**Acknowledgements**

I would like to acknowledge and give my warmest thanks to the Tshwane University of Technology and IntechOpen for allowing me to write a chapter on one of their books. Their Guidance and advice carried me through all the stages of writing my project.

Finally, I would like to acknowledge the almighty God, for allowing me through all the difficulties. I have experienced your guidance day by day. You are the one who let me finish this project.
