This thesis is lovingly dedicated to those who have guided and supported me throughout this journey. To my family ? Papa Siblings Aunties Uncles Cousins for their unwavering love encouragement sacrifices that fueled dreams. it! friends Ate Cy Kimay Day Dy Jean Lois Pollen ate Jena Rezza constant cheer belief in capabilities. mentors professors wisdom guidance inspiration. Also the working students supervisors shared experiences making research possible. And most of all myself did not give up continued show despite every difficulty she been faced. You a great job you know everything will be paid off. lastly especial Lord thank strength your guidance work stands as testament all strive knowledge success challenges.