Determine whether the lines $$L_1: x = 15 + 6 t, \quad y = 22 + 7 t, \quad z = 9 + 4 t$$ and $$L_2: x = -17 + 7 t \quad y = -17 + 9 t \quad z = -17 + 7 t$$ 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: (, ,)