1. Mathematics & Computer Science Department, Faculty of Science, Menoufia University, Shebin El-Kom, Egypt
2. Department of Mathematics, College of Science and Arts in Ar Rass, Qassim University, Ar Rass, Saudi Arabia
3. Department of Mathematics and Statistics, Faculty of Management Technology and Information Systems, Port Said University, Port Said, Egypt
4. Mathematics Department, Faculty of Science, Al-Azhar University, Nasr City, 11884 Cairo, Egypt