Thank you to all who helped me to complete this paper successfully; to all those who advised me, helped me to correct, and proofread the paper.
I would like to thank my professor for helping me to publish this paper. More importantly, I would like to thank my family for their assistance and encouragement during the time I was writing this paper.
I would like to thank my fellow students for their contribution to this paper. In addition, I would like to thank my publisher who helped me in choosing this paper and for his effort to publish it.