1. Mathematics Education Department, Universitas Islam Negeri Sultan Syarif Kasim, Pekanbaru, Indonesia
2. Department of Electrical Engineering, Faculty of Science and Technology, Universitas Islam Negeri sultan Syarif Kasim, Pekanbaru, Indonesia
3. Department of Mathematics and Statistics, Faculty of Science, Universiti Putra Malaysia, Selangor, Malaysia
4. Department of Mathematical Sciences, Faculty of Science & Technology, Universiti Kebangsaan Malaysia, Bangi Selangor, Malaysia