“The journey of thousand miles begins with a single step”.This dissertation is one of the most challenging projects that I will ever undertake and I would like to take this opportunity to thank all the people who contributed to the successful completion of my dissertation. I would like to express my sincere gratitude to Ms Deborah Robert, my supervisor, who served as a mentor for me throughout the dissertation schedule. I would like to thank her especially for her patience and time, for her constant encouragement, advice and guidance during the entire period of my dissertation. Her support was indispensable in completing this dissertation. It was truly a great learning experience working with her. I would also like to thank other module sup...