Extracted text: Question #1 For the structure shown below the members have the following properties: Member AC and AB: EA = 1.5e6 kN; Springs CD and BE: stiffness k= 0.4e4 kN/m; Orientation of springs along line B-C A moment of 90kNm is applied to point C, on member CA. (a) Using the stiffness matrix method calculate the internal forces in all the members. (b) Based on your results in (a) sketch the deflected shape. (c) Based on your results in (a) sketch the bending moment diagram. (d) Based on your results in (a) sketch the axial force diamgram El=0.6e5 kNm?. Show all relevant equations, matrices and vectors and the solution process. В E 6m 90kNm 4.5m