Consider a function\( f: D_4 → D_4\) where for any x in D4, the function f is defined by f(x) = x2. Which of the following statements about the function f is true?
1
f is a bijection (both injective and surjective).
2
f is not a bijection, but it is a surjection.
3
f is not a bijection, but it is an injection.
4
f is neither a surjection nor an injection.