1. Department of Mathematics, Faculty of Arts and Science, Amman Arab University, Amman 11953, Jordan
2. Department of Mathematics, Faculty of Science, Yarmouk University, Irbid 22163, Jordan
3. Department of Mathematics, Faculty of Science, The Hashemite University, Zarqa 13133, Jordan
4. Department of Mathematics, Faculty of Science, Al-Balqa Applied University, Salt 19117, Jordan
5. Department of Mathematical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Malaysia