Problem 2: [6 points] Consider the following JavaScript skeletal program: // The main program var function subi) var x function sub2 function sub3 t Assume that the execution of this program is in the following unit order main calls subl subl calls sub2 sub2 calls sub3 a. Assuming static scoping, in the following, which declaration of x is the comect one po2 m which of x is the correct one for a reference to X? b. Repeat part a, but assume dynamic scoping