How would I answer the following two vector questions?

Question 20 (1 point) Listen If u is perpendicular to v, then u x v = Oo O 27 Outd Question 16 (1 point) Listen The angle between the vectors | v2 - 1, v2 + 1, v2] and [1, 1, 1] is: O 45 O 30 90 60