1. Operations Research Department, Faculty of Graduate Studies for Statistical Research, Cairo University, Giza, Egypt
2. Mathematics Department, College of Science and Arts, Al-Badaya, Qassim University, Buraydah, Saudi Arabia
3. Mathematics Mathematics, College of Science and Arts, Methnab, Qassim University, Saudi Arabia
4. Mathematics Division, School of Advanced Sciences & Languages, VIT Bhopal University, Sehore-466114, MP, India