Q$7$: Assume the following JavaScript program was interpreted using static$-$scoping

rules. What value of $\backslash ($ x $\backslash )$ is displayed in function sub$1?$ Under dynamic$-$scoping rules, what value of x is displayed in function sub$1?(6$ marks$)$

$```$

var x;

function subl$()\{$

document.write$("$ x $="+$ x $+"$

$")$;

$\}$

function sub$2()\{$

var x;

x $=10$;

sub$1()$;

$\}$

x $=5$;

sub$2()$;

$```$