1. Department of Mathematics, Shaheed Benazir Bhutto University Sheringal, Sheringal 18050, Pakistan
2. Statistics & Operations Research Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia
3. Military Academy, University of Defence in Belgarde, 11000 Belgrade, Serbia
4. Department of Public Safety, Government of Brčko District of Bosnia and Herzegovina, 76100 Brčko, Bosnia and Herzegovina
5. Faculty of Mechanical Engineering, University of Niš, 18000 Niš, Serbia