Determine whether the lines $$L_1: \frac{x - 15}{6} = \frac{y-22}{7} = \frac{z - 9}{4}$$ and $$L_2: \frac{x + 2}{-18} = \frac{y-3}{-21} = \frac{z - 0}{-12}$$ intersect, are skew, or are parallel. If they intersect, determine the point of intersection; if not leave the remaining answer blanks empty.
Do/are the lines (intersect/skew/parallel):
Point of intersection: (, ,)