1. Department of Mathematics, University of Jhang, Jhang 35200, Pakistan
2. Department of Mathematics, College of Science, King Khalid University, Abha 61413, Saudi Arabia
3. Faculty of Science, Jiangsu University, Zhenjiang, Jiangsu 212013, P. R. China
4. Department of Computational Sciences, Christ University, Delhi NCR, Ghaziabad 201003, India