Code Example $7-1$

double calculate$\_$hypotenuse$($double side$\_$a$,$ double side$\_$b$)\{$

double hypotenuse $=$ sqrt$(($side$\_$a $*$ side$\_$a$)+($side$\_$b $*$ side$\_$b$))$;

return hypotenuse;

$\}$

$($Refer to Code Example $7-1.)$ Which of the following statements could you use to code a declaration for the calculate$\_$hypotenuse function?