A plum is located at coordinates (-9.66 m, 0, 2.67 m). In unit-vector notation, what is the torque about the origin on the plum if that torque is due to a force whose only component is
(a) Fx = 7.25 N,
(b) Fx = -7.25 N,
(c) Fz = 7.25 N, and
(d) Fz = -7.25 N?