Consider the following variable declarations in conjunction to the above type declarations

VAR

s : T$10$;

t : T$10$;

u : T$9$;

v : array $[5][4]$ of T$7$;

w$,$ z : struct $\{$

int a;

struct T$4*$ next;

$//$ var declaration section

$\}$;

x$,$ y : struct $\{$

int a;

struct T$4*$ next;

$\}$;

f : function of T$10$ returns float;

g : function of T$10$ returns A$1$;

m : float;

n : A$1$;

Assume that assignments between variables are allowed if the types of the variables are equivalent. For

each of the following, list all type equivalence schemes under which the expression is valid. Consider

name equivalence, internal name equivalence, and structural equivalence for each case. Assume that if

two variables are equivalent under name equivalence, they are also equivalent under internal name

equivalence.

$$ s $=$ t;

$$ t $=$ u;

$$ u $=$ v;

$$ v $=$ w;

$$ w $=$ z;

$$ z $=$ x;

$$ m $=$ f$($s$)$

$$ n $=$ f$($u$)$