Select all that are corrections for the program shown below.

#include $($stdio$.$h$)$

#define PI $3\mathrm{.}14$

int main$()$

$\{$

double rad, area;

$/*$ Read the radius from the user

printf $("$Enter the radius of a circle: $")$;

scanf $("\%$lf$",$ &rad$)$;

$//$ Calculate the area

area $=$ PI $*$ rad;

$//$ print the area

printf $("$Area: $\%6\mathrm{.}2$f

$",$ area$)$;

return $0$;

$\}$