6.(a) Determine whether the lines ?1and ?2 are parallel, skew, or intersecting. If they intersect, find the point of intersection. [6 points] ?1: ? = 5 − 12 ?, ? = 3 + 9?, ? = 1 − 3? ?2: ? = 3 + 8?, ? = −6?, ? = 7 + 2?
(b) Find the distance between the given parallel planes. [10 points] 2? − 4? + 6? = 0, 3? − 6? + 9? = 1
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