m Question 16. N Grade H An equation of the plane containing the points P (2, 4, 5), Q (1, 5, 7), and R(-1, 6, 8). 3x - 2y - 3z = 20 xty+z= 11 x- y - 2z = 11 x + 3y - z=9Question 8. Grade O H N m Let |lull = 6, ||31| = 4, and the angle between the two vectors 0 =" Find the magnitude of 3u + 4v. 11 ull = 4 113u + 4011 = 2V217 |13u + 4v]| = 29 IN VIN = 4 |13u + 4011 = 34 |13u + 4811 = 31/29 13ut Yu1 3 ( 6 ) + 4 ( 4 ) = 34Question 3. Grade O N m + A set of vectors are mutually orthogonal if every pair of vectors are orthogonal. True or False: The set of vectors (1, 2, 3), (-3, 0, 1), and (0, -3, 2) are mutually orthogonal. True False