1. Department of Mathematics, University of Peshawar, Khyber Pakhtunkhwa 25120, Pakistan
2. Department of Mathematics, Tafila Technical University, Tafila, Jordan
3. College of Engineering, Al Ain University, Al Ain, UAE
4. College of Engineering and Technology, American University of the Middle East, Kuwait
5. Department of Mathematics, COMSATS University Islamabad, Abbotabad Campus, Khyber Pakhtunkhawa, Pakistan