1. Department of Mathematics, Faculty of Science, Zarqa University, Zarqa, Jordan
2. Department of Mathematics, Faculty of Education, Holy Quran and Islamic Sciences University, Omdurman, Sudan
3. Department of Mathematics, Faculty of Sciences and Arts-Almikwah, Albaha University, Al Baha, Saudi Arabia
4. Department of Mathematics, Faculty of Education, Omdurman Islamic University, Omdurman, Sudan
5. Department of Mathematics, Faculty of Sciences and Arts-Bukirayh, Alqassim University, Buraydah, Saudi Arabia