1. Department of Mathematics, Mohi-ud-Din Islamic University, Nerian Sharif, 12080 AJ&K, Pakistan
2. Department of Mathematics, Quaid-i-Azam University, Islamabad 44000, Pakistan
3. Department of Industrial & Systems Engineering, College of Engineering, Princess Nourah bint Abdulrahman University, P. O. Box 84428, Riyadh 11671, Saudi Arabia
4. Mathematics Department, Al-Qunfudah University College, Umm Al-Qura University, Mecca, KSA
5. Department of Mathematics, College of Science and Humanities in Al-Aflaj 11912, Saudi Arabia
6. Department of Mathematics, Faculty of Science, Damietta University, New Damietta 34517 Damietta, Egypt