1. Department of Basic Sciences, Preparatory Year Deanship, King Faisal University, Al-Ahsa 31982, Saudi Arabia
2. Department of Mathematics, Faculty of Sciences and Arts, King Abdulaziz University, Rabigh 21911, Saudi Arabia
3. Department of Mathematics, College of Science, Qassim University, Buraydah 51452, Saudi Arabia
4. Department of Mathematics, Abdul Wali Khan University, Mardan 23200, Pakistan