1. Department of Mathematics, Quaid-i-Azam University, Islamabad, Pakistan
2. Department of Mathematics, Faculty of Applied Sciences, Umm Al-Qura University, Makkah, Saudi Arabia
3. Department of Mathematics, College of Sciences, King Khalid University, Abha, Saudi Arabia
4. Department of Mathematics, College of Science and Humanities in Alkharj, Prince Sattam bin Abdul Aziz University, Al-kharj, Saudi Arabia
5. Department of Basic Engineering Science, Faculty of Engineering, Menoufia University, Shebin El-Kom, Egypt