Review Reports

Round 1

Reviewer 1 Report

1. Please also use different patterns in the bars in Figures 7, 9, 11, and 15. Otherwise, it's difficult to distinguish the differences when the paper was printed in black and white.

2.  In figures, the font size should be consistent, e.g., Figure 7. 

3. Any physical meaning of Eq. 3? 

Any future work?

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

Please refer to the attached report

Comments for author File: Comments.pdf

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

The authors have already modified the manuscript based on my comments. So, I believe it's ready to be published.

Reviewer 2 Report

The manuscript has been updated accordingly and ready to be accepted for publish. However, there is very minor correction need to be made before publish as below; 

i. All figures need to label (a), (b), (c) etc and not a, b, c &

ii. Please use standard size font for labelling