5. 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. 1. function bigsub) 2 var mysum function a) var X function b (sum) var y,Z (z) ; 10. // end of b 12 13. 14. // end of a 15 function c(plums) 16. 17. // end of c 18 19.. 20 a) b (x) var 1 /7 end of bigsu 5. 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. 1. function bigsub) 2 var mysum function a) var X function b (sum) var y,Z (z) ; 10. // end of b 12 13. 14. // end of a 15 function c(plums) 16. 17. // end of c 18 19.. 20 a) b (x) var 1 /7 end of bigsu