Here is some code. There are only two outputs, one a message from the unnamed namespace the other a message from the Savitch namespace. Tell which line generates which message.

```
#include using namespace std;namespace
{
void message();
}
namespace Savitch
{
void message();
}
int main()
{
{
message(); //a)
Savitch::message(); //b)
using Savitch::message;
message(); //c)
}
message(); //d)
return 0;
}

namespace Savitch
{void message()
{cout << "Message from NS Savitch\n";}
}namespace
{void message(){
cout <<"Message from unnamed NS\n";
```
1) List the letters of the lines that give the message from the unnamed namespace:
____________________
2) List the letters of the lines that give the message from the Savitch namespace:
____________________
What will be an ideal response?

1) List the letters of the lines that give the message from the unnamed namespace:
__a) and d)____________
2) List the letters of the lines that give the message from the Savitch namespace:
__b) and c)____________
Explanation: a) is a use of message() in a file with an unnamed namespace
containing a definition of message(). This is an invocation of the unnamed.
namespace function. b) is a use of a qualified name, Savitch::message().
This is a use of the name from the Savitch namespace. c) follows a using
declaration of message from the Savitch namespace, that is also a use of
message() from that namespace. The block ends, so the using declaration
expires, and the next message() is from the unnamed namespace again.