Based on the following code and knowing that recursive calls are allowed, but NOT forward references

-List potential procedures that could be called by the following procedures

fill in below chart for Main, Sub1, Sub2 and Sub3 based on the program at the bottom:

Again rembember that recursive calls are allowed but NOT forward references.

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main can call:_______________________________

sub1 can call:_______________________________

sub2 can call:_______________________________

sub3 can call:_______________________________

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proc main; var w, x, y, z;

proc sub1; var x, z; X := 6; Z := 7; x :=x + y * z; end sub1;

proc sub2; var w, x, y; w := 11; subl; end sub2;

proc sub3; var w; w := 1 O; x := w+x; y := x + z + 2; end sub3;

begin w := O; x := 1; y := 3; z := 5; sub2; sub3;

end main.