The normal \(3 \times 3\) magic square uses numbers \(1\) to \(9\). Try to make a magic square with numbers 4 to 13. What is the new magic sum? 
 
[Hint: Use general form of \(3 \times 3\) magic square using numbers \(1\) to \(9\)]
 
\(6\)  
    \(5\)
 
Magic sum \(=\)