1. Department of Mathematics and Statistics, Hazara University Mansehra, Mansehra, Khyber Pakhtunkhwa, Pakistan
2. Department of Applied Mathematics, Chung Yuan Christian University, Taoyuan, Taiwan
3. Department of Business Administration, Faculty of Science and Humanity Studies in Al-Sulail, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
4. Department of Mathematics and Statistics, College of Science, Taif University, Taif, Saudi Arabia