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8. Consider the following JavaScript program: var x,y,z; function sub1() { var a,y,z; function sub2() { var a,b,z; . } . . . function sub3()

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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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