1. Department of Basic Sciences, General Administration of Preparatory Year, King Faisal University , Al Ahsa 31982 , Saudi Arabia
2. Department of Business Administration, College of Business Administration, Princess Nourah Bint Abdulrahman University , P.O. Box 84428 , Riyadh 11671 , Saudi Arabia
3. Department of Basic Sciences, College of Science and Theoretical Studies, Saudi Electronic University, (Jeddah-M) , Riyadh - 11673 , Saudi Arabia
4. Department of mathematics, College of Science, King Khalid University , Abha , Saudi Arabia
5. Department of Mathematics, Abdul Wali Khan University , Mardan , 23200, Khyber Pakhtunkhwa , Pakistan