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1. What are the uses of the keyword static.
    - A variable declared static within the body of a function maintains its value between
function invocations
    - A variable declared static within a module, (but outside the body of a function) is
accessible by all functions within that module. It is not accessible by functions within any
other module. That is, it is a localized global
    - Functions declared static within a module may only be called by other functions within
that module. That is, the scope of the function is localized to the module within which it is