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For the shown frame, use the stiffness matrix analysis to determine: (a) The displacements vector D (show the known and unknown DOFs). (b) The loads vector Q (show the known and unknown forces). (c) The member stiffness matrices in local coordinates. (d) The member stiffness matrices in global coordinates. (e) The structure stiffness matrix. (f) The reactions at the supports. Assume supports A and C are fixed. Take -6 4 -3 2 I=300(10) m, 4 = 10 (10) m, and E= 200 GPa for both members A 9.6 kN/m 4 m B 2 m 2 m 8 kN