3. 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. The calling sequence for this program for execution to reach d is bigsub calls a a calls b The calling sequence for this program for execution to reach d is bigsub calls a a calls b b calls a a calls c c calls d 3. 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. The calling sequence for this program for execution to reach d is bigsub calls a a calls b The calling sequence for this program for execution to reach d is bigsub calls a a calls b b calls a a calls c c calls d