Assume the following JavaScript program was interpreted using static-scoping rules. What value of x is displayed in function sub1?

Under dynamic-scoping rules, what value of x is displayed in function sub1?

var x;

function sub1() {

document.write("x = " + x + ""); }

function sub2() { var x;

x = 10;

sub1(); }

x = 5; sub2();.