1 Given that \(z\) is a complex number, and that \(z ^ { * }\) is the complex conjugate of \(z\), which of the following statements is not always true?
Circle your answer.
[0pt]
[1 mark]
$$\left( z ^ { * } \right) ^ { * } = z \quad z z ^ { * } = | z | ^ { 2 } \quad ( - z ) ^ { * } = - \left( z ^ { * } \right) \quad z - z ^ { * } = z ^ { * } - z$$