Acknowledgement The success and final outcome of this assignment required a lot of guidance and assistance from many people and we extremely fortunate to have got this all along the completion of our assignment work. Whatever we have done is only due to such guidance and assistance and we would not forget to thank them. I respect and thank Ms. Vimalah for giving we an opportunity to do this assignment work and providing us all support and guidance which made me complete the assignment on time, We extremely grateful to her for providing such a nice support and guidance. We are really grateful because we managed to complete this assignment within the time given by Ms.Vimalah. This assignment cannot be completed without the effort and co-operation from our group members. Group memberโs Zaniah, Shakila, Sharif, Icuk, and Thomas. Last but not least, we would like to express our gratitude to our friends and respondents for support and willingness to spend some time with us.