Let \(z\) be a complex number where \(\operatorname{Re}(z)>0\) and \(\operatorname{Im}(z)>0\).
Given \(|\bar{z}|=4\) and \(\arg \left(z^3\right)=-\pi\), then \(z^2\) is equivalent to
- \( {4z} \)
- \( -2 \bar{z} \)
- \( 3z \)
- \(\bar{z}^2\)
- \(-4 \bar{z}\)