For the block$-$structured code of Fig. $1\mathrm{.}14,$ assuming the usual

static scoping of declarations, give the scope for each of the twelve declarations

Figure $1\mathrm{.}13$: Block$-$structured code

$\{$ int w$,x,y,z$; $/*$ Block B$1*/$

$\{$ int $x,z$; $//$

$\{$ int w$,x$; $/*$ Block B$3*/\}$

$\}$

$\{$ int w$,x$; $/*$ Block B$4*/$

$\{$ int $y,z$; $/*$ Block B$5*/\}$

$\}$

$\}$

please show step by step