Vector u has its initial point at (21, 12) and its terminal point at (19,-8). Vector v has a direction opposite that of u, whose magnitude is five times
the magnitude of v. Which is the correct form of vector v expressed as a linear combination of the unit vectors I and J?
A. v=-10I+4J
B. V=-0.4I-4J
V=0.41I +4J
D. V= 15I + 100J