Consider the following JavaScript skeletal program: //the main program var X: function sub1 () { var x: function sub2() { ... } } function sub3 () { ... } Assume the execution of this program is in the following unit order: main calls sub1 sub1 calls sub2 sub2 calls sub3 a. Assuming static scoping, which declaration of x is the correct one for a reference to x in: i. sub1 ii. sub2 iii. sub3 b. Repeat part a, but assume dynamic scoping. 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 ()