please show all work 4. Consider points A(2,−3,0) and B(−1,2,1). Let u be the vector connecting the origin to point A, and vector v be the vector connecting the origin with point B. (a) Write vectors u and v (b) Find 4u − v (c) Find |u + 3v|

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A: Let (a) To find .(b) To find .(c) To find .(d) To find .