Show the stack with all activation record instances, including static and dynamic chains, when execution reaches position 1 in the following skeletal program. Assume Bigsub is at level 1.

function Bigsub () {
function A (){
function B () {
. . . 1
} // end of B
function C () {
. . .
B();
. . . } // end of C
. . . C() . . .
}// end of A
. . .
A();
. . . } //end of Bigsub