Could you please help me this

Question 11 (2 points) a = (1, 0, -4) and 6' = (5, 2, 1), For the vector what is the scalar projection of b onto a? O 1 V17 O 30 O 1 V30 Question 12 (1 point) What is the magnitude of the cross product between (3, 0, -4) and (2, 0, 1)? O2 O V2 O11 O5 Question 13 (1 point) What is the area of the parallelogram formed by the vectors a = (1, 0, 2) and 6 = (0, -1, 2) O9 9/2 O 3/2 O3 Question 14 (2 points) What is the vector projection of vector T = (2, 1, 4) and y' = (-3, 4. 0) ? O- 3 (2, 1, 4) O - 25 2 (-3, 4, 0) O-?(-3, 4, 0) O _ 2 (2, 1, 4) Question 15 (2 points) To the nearest degree, what is the angle between T = (1, -3, 4) and y' = (-2, -2, 3) O 63 O 48 O 80 O40