1. Zagazig University, Al-Sharqia Governorate, Egypt
2. Computer Science department, University of Sharjah, Sharjah, United Arab Emirates
3. 3Statistics & Operations Research Department, College of Sciences, King Saud University, Riyadh, Saudi Arabia
4. School of IT and Systems, University of Canberra, Canberra, ACT, Australia
5. University of Sydney, Sydney, NSW, Australia