Rewrite the vector equation $\mathbf{r} (t) = (-3 + 3 t) \mathbf{i} + (1+ 5 t) \mathbf{j} + (-3 - 3 t) \mathbf{k}$ as the corresponding parametric equations for the line.

$x(t) =$
$y(t) =$
$z(t) =$