2) For the program shown below, draw a picture of the run-time environment at the point marked "HERE", and explain how variables x, y, and z, are accessed, for each of the following two techniques:

a) Static Links

b) Displays program

bar();

var b: integer;

procedure foo(var x: integer);

var x1: integer;

procedure baz(y: integer);

procedure zab(z: integer);

begin if z = 1 then zab(0) else x := y + z; // HERE

end:("zab") begin("baz") zab(1);

end("baz") begin("foo") z1 := 3;

baz(x1);

end:("foo") begin("main") foo(b);

end