What is the output when you compile and run the following code? You can assume that the codes are in main unless indicated otherwise, and the compiler

follows c$++11$ standard. All necessary directives such as iostream are included and namespace std is used.

#include $$iostream$$

using namespace std;

class Person $\{$

public:

string name;

Person$($string $\_$name$)\{$

name $={?}_{-}$name;

$\}$

void setName$($string $\_$name$)\{$

name $=\_$name;

$\}$

string getName$()$ const $\{$

return name;

$\}$

$\}$;

int main$()\{$

Person$*a=$ new Person $("$Tom$")$;

const Person$*b=a$;

a$->$setName $("$Joe$")$;

cout $$ b$->$getName$()$ end $1$ ;

delete a;

$\}$

Joe, because b is a new copy of the person object pointed to by a$.$

Tom, because b is a new copy of a$.$

Tom, because the const keyword.

Joe, because b points to the same person object as a$.$