1. Department of Mathematics, Abdul Wali Khan University, Mardan, Pakistan
2. Department of Basic Sciences and Humanities, College of Computer and Information Sciences, Majmaah University, Al-Majmaah, Saudi Arabia
3. Department of Mathematical Sciences, University of Lakki Marwat, Lakki Marwat, Pakistan
4. Department of Mathematics, College of Science and Arts, King Abdulaziz University, Rabigh, Saudi Arabia