Question: 8. Consider the following JavaScript program: var X, Y, z; function sub1() { var a, Y, z; function sub2 () { var a, b,

8. Consider the following JavaScript program: var X, Y, z; function sub1()

8. Consider the following JavaScript program: var X, Y, z; function sub1() { var a, Y, z; function sub2 () { var a, b, z; } function sub3 () { var a, X, W; } List all the variables, along with the program units where they are declared, that are visible in the bodies of sub1, sub2, and sub3, assuming static scoping is used.

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