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Question $2$

With regard to the following JavaScript program,

var x;

function sub$1()$

dacumentwrite$((x=+x+)$;

$\}$

unctiopusub$2()$

var x ;

If it is interpreted using static$-$scoping rules. What value of $x$ is displayed in

function sub$1?$ Why?

If it is under dynamic$-$scoping rules, what value of $x$ is displayed in function sub$1?$ Why?

Question $3$

Consider the following JavaScript program:

varx$=1,y=2$;

functionsubl$)\{$

var $a=3,z=4$;

var $m=y$;

function sub$22)$

$p=x$;