The output of the following code is:

$$x=5$;

$$y=$;

$$z=0$;

$if($$$x,$&&$,!$$$y,$&&$,!$$$z),\{$

$$w=$$$x+Sz$;

echo $$w$;

$\}$

Select one:

a$.-5$

b$.5$

c$.6$

d$.4$