If u = (6, 9) and v = (24, 36) with an angle 9 between the vectors, are u and V parallel or orthogonal? Explain. O The vectors are parallel because cos 9 = -1. ' O The vectors are parallel because u - v = 0. ' O The vectors are orthogonal because u - v = 0. O The vectors are orthogonal because cos 9 = -1