Vector u has its initial point at (-7, 2) and its terminal point at (11, -5). vector v has a direction opposite that of vector u, and its magnitude is three times the magnitude of u. what is the component form of vector v? a. v = < -54, 63> b. v = < -162, -63> c. v = < -54, 21> d. v = < -162, 21>