Suppose $f$ is a function that's defined for all real numbers $x$. Assume it's neither even nor odd. Below you will find other functions defined in terms of $f$
For each function enter the letter E if the function is even, the letter O if it's odd, and the letter N if it's neither even nor odd.
$g(x) = f(x) + f(-x).$
$g(x) = f(x) - f(-x).$
$g(x) = f(-x).$