Assume the following declarations are in effect:

struct shape $\{$

struct $\{$

char usertag$[5]$;

char desc$[20]$;

$\}$ id;

int centerx;

int centery;

union $\{$

struct $\{$

int height, width;

$\}$ rectangle;

struct $\{$

int radius;

$\}$ circle;

$\}$ u;

$\}$s;

Each of the following statements is invalid for some reason. Provide the correct syntax.