Given the following program:

#include

using namespace std;

int x = 10;

int main() {

int x = 20;

{

int x = 30;

cout << "1st output statement: x = " << x << endl;

}

cout << "2nd output statement: x = " << x << endl; // use scope resolution operator ( :: ) to access global x

cout << "3nd output statement: x = " << ::x << endl;

return 0;

}

What are the values of x in the following output statements?

1st output statement: x = ?

2nd output statement: x = ?

3rd output statement: x = ?