1. Department of Mathematical Sciences, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
2. Umm Al-Qura University, College of Education for Girls at Al-Qunfudah, Mathematics Department, Mecca, Saudi Arabia
3. Department of Mathematics, Abdul Wali Khan University Mardan, Khyber Pakhtunkhwa 23200, Pakistan
4. Department of Mathematics, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana