Find all the reactions at point O. You can either express them by their x, y, and z components, or in Cartesian vector form, whichever is easier. As usual you must show the equilibrium equations you are using to calculate your answers [18 points] 8 m F DEN ER 6 m Z X Figure 2 Figure 2 shows a highway sign held up by an aluminum pole. The pole is fixed into the ground with concrete at point O. The aluminum pole is light (it's weight can be neglected), but the sign itself is heavy. It also experiences a drag force from the wind blowing into its back. Combining these two forces gives a total applied load on the sign of = 0 kN +2.8 kNj- 1.8 kN k. This force is directed at the center point of the sign (dimensions shown in Figure 2). Given this information: (a) Draw a complete free body diagram (FBD) for the structure [7 points]