1. The Second Industrial Equipment Installation Company Limited, Yantai Construction Group 1 , Yantai 264000, China
2. Department of Mathematics, Faculty of Science, Khon Kaen University 2 , Khon Kaen 40002, Thailand
3. Institute of Mathematics, Khwaja Fareed University of Engineering and Information Technology 3 , Rahim Yar Khan 64200, Pakistan
4. Department of Basic Sciences, College of Sciences and Theoretical Studies, Dammam-Branch, Saudi Electronic University 4 , Riyad, Saudi Arabia
5. School of Business Studies, Unicaf University, Longacres 5 , Lusaka, Zambia