1. School of Informatics and Applied Mathematics, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia
2. Department of Mathematics, College of Science, Isra University, Amman, Jordan
3. Faculty of Informatics and Computing, Universiti Sultan Zainal Abidin, Kuala Terengganu, Malaysia
4. Department of Computer Science and Mathematics, Universiti Technologi MARA (UITM) Terengganu, Campus Kuala Terengganu, Malaysia