Consider the following function definition:

int func$($int x$,$ double y$,$ char u$,$ string name$)$

$\{$

$//$ function body

$\}$

Which of the following are correct function prototypes of the function func?

int func$($x$,$ y$,$ u$,$ name$)$;

int func$($int s$,$ double k$,$ char ch$,$ string name$)$;

int func$($int$,$ double, char, string$)$;

func$($int$,$ double, char, string$)$;