Which of the following statements are true about the two functions defined here?

string reverse$\_$str$($string str$)$

$\{$

string val $=""$;

if $($str $==""||$ str$.$length$()<=1)$

$\{$

return str;

$\}$

string first $=$ str$.$substr$(0,1)$;

string rest $=$ str$.$substr$(1,$ str$.$length$()-1)$;

val $=$ reverse$\_$str$($rest$).$append$($first$)$;

return val;

$\}$

string iter$\_$reverse$($string str$)$

$\{$

int len $=$ str$.$length$()$;

int mid $=$ len $/2$;

for $($int i $=0$; i $<$ mid; i$++)$

$\{$

char ch $=$ str$[$i$]$;

int pos $=$ len $-$ i $-1$;

str$[$i$]=$ str$[$pos$]$;

str$[$pos$]=$ ch;

$\}$

return str;

$\}$

Question $18$ options:

The reverse function is a recursive solution, and the iter$\_$reverse function is an iterative solution.

The two functions execute at about the same speed.

For a string of length n$,$ the reverse function makes about n$/2$ recursive calls but the iter$\_$reverse function performs about n$/2$ iterations.

All of the above.