1 Retraction Note to: Computational and Applied Mathematics (2019) 38:131 https://doi.org/10.1007/s40314-019-0887-4

The Editor-in-Chief has retracted this article Zafar (2019) because it shows significant overlap with a previously published article Daşbaşi and Daşbaşi (2017). The author, Zain Ul Abadin Zafar does not agree to this retraction.