$\mathbf{r}_1(t) = \left(-4.5,4,-7\right) + t \left<3,4,0\right>$

$\mathbf{r}_2(t) = \left(-3,0,-6\right) + t \left<-3,2,-1\right>$

Find the point of intersection, $P$, of the lines $\mathbf{r}_1$ and $\mathbf{r}_2$.

$P$ =