8. What is the area of the parallelogram formed by the vectors a = (l, 0, 2) and b = ( 0, -1, 2)? a) 3 C) b) 9 d) renown. 9. A 50 N force is applied at the end of a wrench that is 20 cm long. The force makes an angle of 50\" with the wrench. What is the magnitude of the torque about the point of rotation? a) 6.4] c) 640} b) 7.7] d) 770] Application 10. Determine the value of t such that the vectors (1', 3t, 3) and (t, 2, 3) are perpendicular. 1]. Determine the angle, to the nearest degree, between the vectors x = (4, 6, -2) and y = ( l, 8, 2). 12. Suppose (2, -3, 4) x (I, 7, a ) = (-16, 12, 17 ). Determine the value ofa