1. Kwame Nkrumah University of Science and Technology,Department of Computer Science,Kumasi,Ghana
2. Ho Technical University,Department of Computer Science,Ho,Ghana
3. University of Cape Coast, PMB University Post Office,Department of Computer Science and Information Technology,Cape Coast,Ghana
4. School of Computer Science and Engineering, University of Electronic Science and Technology of China,Chengdu,China,611731
5. College of Management Information Systems, University of Ghana