Decide which of the three lines, taken two at a time, are parallel, intersect or are skew to eac other. If they intersect find their point of intersection. L1: x=1+2t, y=-1-t, z= 3t L2: x=2-s, y = 3s, z = 1+s L3: x=5+2r, y=1-r, z= 8+3r

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