Hello … ok so this is my first mastery … and it is all abot create and run a command line. And I include the use of comments mastery 7. So here are the steps you have to follow: Open atom and create the program “Hello World” Open cygwing. (change directory if needed). Run the… More Mastery 1 : Ability to create C++ file and run from command line. Mastery 7: Use of comments in C++.