Question 13 [2 points) a. Determine the algebraic relation between pand a such that the vectors 7= (Sp, 2, -1} and :' = (-1, q, q + 1) are perpendicular to each other. b. Calculate q if p = -6 and the vectors are perpendicular to each other. Question 14 [2 points) The vectors Z' and 3' have magnitudes of 6 and 8. respectively. The angle between Z' and 3' is obtuse and the magnitude of Z' X? is 16. Determine the angle, to the nearest degree, between E' and 3