Consider the two lines in R³: r₁(t) = (0,-1,-1) +t(4,2,0) and r₂ (s) = (7,-7,4) + s(1, 1,4). Find a vector perpendicular (i.e., normal) to both r₁(t) and r₂ (s). Use a scalar projection to find the minimum distance between the two lines. Find the values of t and s at which this minimum distance is achieved. a. b. C.

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