Assume that the unit vector i points towards the east and the unit vector j points north. Suppose that we are given two non-zero vectors u and v such that u = 4j and u ⋅ v = 0. Which of the following statements must be true? (More than one answer may be correct.) (Zero or more options can be correct) a. v points east or west  b. v points south. c.  v is parallel to u d.  v is perpendicular to u   If ?∙? = 0, what can you say about the directions of nonzero vector ? and nonzero vector ?? a. They are parallel to each other b. They are antiparallel to each other c. They are perpendicular to each other d. Either antiparallel nor orthogonal

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