1. Tikrit University, College of Sciences, Tikrit, Iraq
2. School of Mathematics, Madurai Kamaraj University, Madurai, India
3. Faculty of Computer Science and Informatics, Amman Arab University, Amman, Jordan
4. Department of Computer Engineering, College of Computers and Information Technology, Taif University, Taif, Saudi Arabia
5. Department of Mathematics, College of Education for Pure Sciences, Tikrit University, Tikrit, Iraq
6. Dept of Mathematics, Kandaswami Kandar’s College, Velur Namakkal, Tamilnadu, India
7. Department of Statistics, Injibara University, Injibara, Ethiopia
8. Department of Computer Science & Engineering Bipin Tripathi Kumaon, Institute of Technology, Dwarahat, India