Assume $1$ byte char, and $8$ byte pointer variables. Consider the following program:

$01$ #include

$02$

$03$ void toUpperCase$($char $*$buffer$)\{$

$04$

$05$ while $(*$buffer $!=\text{'}\backslash 0\text{'})\{$

$06$ if $(\text{'}$a$\text{'}<=*$buffer && $*$buffer $<=\text{'}$z$\text{'})\{$

$07*$buffer $-=32$;

$08\}$

$09$ buffer$++$;

$10\}$

$11\}$

$12$

$13$ int main$()\{$

$14$ char word$[]=$ "hello $2401$ midterm";

$15$ toUpperCase$($word$)$;

$16$ printf$("\%$s

$",$ word$)$;

$17\}$

How many bytes are written to char $*$buffer on line $3$ when the function on line $15$ is called?

$1$

$18$

$0$

$19$

$8$