1. System of Science, Kunming University of Science and Technology 1 , Kunming, Yunnan, China
2. Department of Quantitative Analysis, College of Business Administration, King Saud University 2 , P.O. Box 71115, Riyadh 11587, Saudi Arabia
3. Department of Mathematics, City University of Science and Information Technology 3 , Peshawar, Pakistan
4. School of Mathematics and Statistics, Central South University 4 , Changsha, Hunan 410083, China
5. Information Department of Mathematics Education, Akenten Appiah Menka University of Skills Training and Entrepreneurship Development 5 , Kumasi, Ghana