1. Department of Mathematical Sciences, Faculty of Sciences, Princess Nourah Bint Abdulrahman University , P.O. Box 84428 , Riyadh 11671 , Saudi Arabia
2. Department of Basic Sciences, General Administration of Preparatory Year, King Faisal University , Al-Ahsa, 31982 , Saudi Arabia
3. Department of Mathematics, Deanship of Applied Sciences Umm Al-Qura University , Makkah , Saudi Arabia
4. Department of Mathematics, Abdul Wali University , Mardan , Pakistan