IdentifyingFreeVars.init()

Click on all of the free variable occurrences below and then check your answer on the right.

true
return IdentifyingFreeVars.validateFreeVar()

It might help to build the parse tree for this expression.

Identify all of the variable declarations (or binding occurrences) in this expression, as well as the scope that each one of them defines.

Review the definition of free occurrences and use the scopes you identified already to answer the question.