(Solved): For each complex number determine the angle, \( \boldsymbol{\theta} \), from \( 0 \leq \boldsymbol ...

For each complex number determine the angle, \( \boldsymbol{\theta} \), from \( 0 \leq \boldsymbol{\theta}<2 \pi \), and the length \( r \). Round to three decimal places when necessary. \[ \begin{array}{l} \mathrm{y}=-9-10 i \\ r_{\mathrm{y}}= \\ \boldsymbol{\theta}_{\mathrm{y}}= \end{array} \]