1. Department of Mathematics, College of Education Salahaddin University‐Erbil Erbil Iraq
2. Department of Mathematics, College of Basic Education Salahaddin University‐Erbil Erbil Iraq
3. Department of Mathematics, College of Basic Education University of Raparin Ranya Iraq
4. Department of Mathematics, College of Science University of Duhok Duhok Iraq
5. Department of Mathematics, Faculty of Science Soran University Soran Kurdistan‐Region Iraq