About the Authors

Khang Jie Liew

kenji_liewkj@yahoo.com.my

Affiliation School of Mathematical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia

Ahmad Ramli

Affiliation School of Mathematical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia

Ahmad Abd. Majid

Affiliation School of Mathematical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KJL AR. Performed the experiments: KJL AR. Analyzed the data: KJL AR. Wrote the paper: KJL AR AAM. Carried out the codings: KJL AR. Obtained the results: KJL.