2. Given two non-parallel lines l1: r = 2+t, y = 4+t, z = 8, and l2: x = 3, y = 2 + t, z = 5+t, (a) determine the direction vectors vị and v2 of lı and l2. Answer: (b) Hence, or otherwise, determine the angle 0 (in degrees) between l1 and l2. Answer: (c) Determine the point of intersection, if it exists, of l1 and l2.

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