1. Department of Mathematics, College of Science, University of Sulaimani, Sulaymaniyah 46001, Iraq
2. Department of Mathematics and Computer Science, University of Oradea, 410087 Oradea, Romania
3. Department of Mathematics, College of Education, University of Zakho, Zakho 42002, Iraq
4. Department of Mathematics, College of Education, University of Sulaimani, Sulaymaniyah 46001, Iraq
5. Research and Development Center, University of Sulaimani, Sulaymaniyah 46001, Iraq
6. Department of Mathematics, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia