1. Consider the following pseudocode:

1. procedure main()
2. a : integer := 1
3. b : integer := 2

4. procedure middle()
5. b : integer := a

6. procedure inner()
7. print a, b

8. a : integer := 3

9. --body of middle
10. inner()
11. print a, b

12. --body of main
13. middle()
14. print a, b

Suppose this was code for a language with the declaration-order rules of C

(but with nested subroutines)that is, names must be declared before use,

and the scope of a name extends from its declaration through the end of

the block. At each print statement, indicate which declarations of a and b

are in the referencing environment. What does the program print (or will

the compiler identify static semantic errors)? Repeat the exercise for the

declaration-order rules of C# (names must be declared before use, but the

scope of a name is the entire block in which it is declared) and of Modula-3

(names can be declared in any order, and their scope is the entire block in

which they are declared).