please show all steps from how to get to eq(23) to eq(24) \[ x^{*}=x_{0} \sqrt{\frac{r_{0}-y_{0}}{r_{0}+y_{0}}} . \] Plugging in and simplifying gives the corresponding \( y \)-coordinate, \[ y^{*}=\frac{x_{0} y_{0}+2 r_{0} y_{0}-r_{0} x_{0}}{2\left(r_{0}+x_ 0 answers