A 41 b AB ta B mm D P BC Bar ABC has a rectangular cross-section of a by b, where a = 270 mm and b = 89 mm. Rod BD has a diameter of 17 mm. Both members are made of a material with Young's Modulus of 212 GPa. Load P= 45 KN is applied at point Cof bar ABC as shown in the figure above. Given AB = BC= 3 m and CD = 4 m. (a) Applying the virtual work method to find the vertical displacement of point C, determine the strain energy due to the bending of bar ABC. CD (b) Applying the virtual work method to find the vertical displacement of point C, determine the strain energy due to the axial force in rod BD. (c) Considering only the effect of bending in bar ABC and axial force in rod BD, what is the vertical displacement of point C?