About the Authors

Mohammed J. Uddin

Affiliations School of Mathematical Sciences, University Sains Malaysia, Penang, Malaysia, Mathematics Department, American International University-Bangladesh, Banani, Dhaka, Bangladesh

Waqar A. Khan

wkhan_2000@yahoo.com

Affiliation Department of Engineering Sciences, PN Engineering College, National University of Sciences and Technology, Karachi, Pakistan

Ahmed I. Ismail

Affiliation School of Mathematical Sciences, University Sains Malaysia, Penang, Malaysia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: WAK. Wrote the paper: WAK MJU AII.