1. Department of Mathematics, Lahore Leads University, 54000 Lahore, Pakistan
2. Abdus Salam School of Mathematical Sciences, GC University Lahore, 54000 Lahor, Pakistan
3. Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam
4. Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam