a) In your own words, explain the concept of variable scope.
Include one or more code fragments that you write for this
discussion post to help illustrate your case. Clearly mark as
appropriate any code fragments as either "script" code or
"function" code, and use comments in your code to note the locality
of each variable at least the first time the variable appears in
the script or function. If a variable is local in scope, be sure to
notate...