Please help with these problems

(1. 10pts) Dynamic type binding is closely related to implicit heap dynamic variables. Explain this relationship. (2. 20pts) Consider the following JavaScript skeletal program: // The main program function sub1 var x; function sub20 function sub30 Assume the execution of this program is in the following unit order: main calls sub1 sub1 calls sub2 sub2 calls sub3 Assuming static scoping, in the following, which declaration of x is the correct one for a reference to x - sub1 -sub2 - sub3 Repeat the above question, but assume dynamic scoping