Show the variable stack configuration at position 1 assuming dynamic scope and a shallow access implementation.

procedure Bigsub is procedure A (Flag: Boolean) is Calling sequence for this pgoram for execution to reach D is: V,W: Integer procedure B is Bigsub calls A A calls E B calls A A calls QC C calls D u,y:Integer A(false) ; end; -- O -of B if flag then B; else C; end; -- of A procedure C is u,WY: Integer procedure D is t,z:Integer Position 1 end; -- O of D end; of C begin t,u,v : Integer A (true); ena; of BigSub