1. Faculty of Science, Yibin University, Yibin 644000, China
2. Department of Mathematics, College of Science Al-Zulfi, Majmaah University, Al Majmaah 11952, Saudi Arabia
3. Department of Basic Sciences, College of Science and Theoretical Studies, Saudi Electronic University, Riyadh 11673, Saudi Arabia
4. Department of Mathematics, Bonga University, Bonga, Ethiopia