1. Electrical Engineering Department, Faculty of Engineering, King Abdulaziz University, Jeddah 80204, Saudi Arabia
2. Department of Mathematics, University of Sargodha, Sargodha, Pakistan
3. Lebanese American University, Department of Computer Science and Mathematics, Beirut, Lebanon
4. Department of Mathematics, Faculty of Science, Al-Azhar University, Nasr City (11884), Cairo, Egypt