Question 10 (1 point) If a - [1, 2, 3] and = [1, 3, -2], find the angle between a and 5. O A) 450 O B) 90 O C) 60 ( D) 85.90 Question 11 (1 point) A weight lifter is holding a object that weighs 300 N above his head. His arms (extended) make an angle of 40 with one another. Determine the magnitude of the tension in each arm. O A) 150 N B) 200 N O C) 222.67 N O D) 159.63 N Question 12 (1 point) A parallelogram is formed by the vectors [-5, 1, 3] and [-2, 3, -4]. Find the area of the parallelogram. O A) 25 square units O B) -2 square units O C) 1014 square units ( D) 31.84 square units