Question 2 (1 point) Saved Which of the following vectors is not perpendicular to vector u =(-5, 2, 1)? ( a) v= (3, 7, 1) O b) v = (-2, -10, 10) O c v = (1, 2, 1) O d) v = (4, 5, 8) e) NO RESPONSEQuestion 6 (1 point) The plane (x, y, z) = (4, 2, 1) + s(1, 1, -2) + t(2, -1, 3), converted into scalar form, has equation ( a) 4x + 2y + z - 5 =0 b) 2x - y - 62 = 0 c) 3x + 2 - 13 = 0 O d) x - 7y - 3z + 13 = 0 O e) NO RESPONSE