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QUESTION 1 [25 MARKS] The 11 m long beam shown in Figure Q1 below has a hinge support at A, and the supports B, C and D are rollers. Use the flexibility method to do the following: (a) Sketch the primary structure [3] (b) Determine the displacements at B and C of the primary structure [6] (c) Determine the flexibility coefficients [8] (d) Write the compatibility equations [2] (e) Determine the reactions at the supports [6] El is constant along the length of the beam. 9 KN 6 KN 5 kN/m 3 kN/m А с MT D 1.5 m + 1.5 m 3 m 2.5 m + 2.5 m FIGURE Q1