1. Department of Computer and Information Science, Faculty of Science and Technology, University of Macau, Macau, China
2. Institute of Business and Management Sciences, Peshawar, KP, Pakistan
3. Department of Computer Science, Islamia College, Peshawar, KP, Pakistan
4. Institute of Computing, Kohat University of Science and Technology, Kohat, Pakistan
5. Department of Computer Science, College of Computers and Information Technology, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
6. Department of Information Technology, College of Computers and Information Technology, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia