Answer
(12,-6,-3)
Work Step by Step
$\operatorname{Let}(X, Y, Z, H)=\left(\frac{1}{2},-\frac{1}{4},-\frac{1}{8}, \frac{1}{24}\right)$
Corresponding point in $\mathbb{R}^{3}$ has coordinates:
$(x, y, z)=\left(\frac{X}{H}, \frac{Y}{H}, \frac{Z}{H}\right)=\left(\frac{1 / 2}{1 / 24}, \frac{-1 / 4}{1 / 24}, \frac{-1 / 8}{1 / 24}\right)=(12,-6,-3)$
