1. Department of Computer Science, Abdul Wali Khan University, Mardan 23200, Pakistan
2. Department of Computer Science, Bacha Khan University, Charsadda 24420, Pakistan
3. Department of Information and Communication Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
4. Faculty of Computer Studies, Arab Open University, P.O. Box 1596, Muscat 130, Oman