• Comments to Author:‎ This paper is very interesting and challenging. Moreover, this paper is well-organized and well-written. ‎In my point of view, the paper deserves for publication in the Journal.‎

• Comments to Editor:‎ The authors answered all my questions and took into account all my comments, whilst on the other ‎hand; they modify the paper as required‏.‏

In fact, I have gone through the final draft in detail and found it up to the mark and well documented. In ‎my opinion, no further additions and deletions are required.‎