Static Scope and Dynamic Scope

Question

I have this program:

var a, b:integer

procedure sub () 

var a,b:real;

begin

…

end

procedure sub1() 

var c:integer

begin

   …a…b…

end

begin

…

end

1. With static scoping, a and b in sub1 are in main?
2. With dynamic scoping, and with chain: main → sub → sub → sub1. Which variables a and b used in sub1?