Question: plz solve upto stiffness matrix only. The frame shown in Figure Q2 is pinned to the foundation at A and D and has rigid joints

plz solve upto stiffness matrix only.
The frame shown in Figure Q2 is pinned to the foundation at A and D and has rigid joints at B and C. The relative values of the flexural rigidities of the members are as shown. Use the matrix displacement (stiffness) method to calculate the principal bending moments for the frame. Sketch the bending moment diagram of the frame. (25 marks)
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