How can I solve this problem? A rigid beam AD is supported by a smooth pin at A

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How can I solve this problem?

A rigid beam AD is supported by a smooth pin at A and by horizontal bars (1) and (2) attached to the beam at points B and C, respectively. Bar (1) is brass with a cross-sectional area of 350 mm2 and an elastic modulus of 110 GPa. Bar (2) is stainless steel with a cross-sectional area of 175 mm2 and an elastic modulus of 190 GPa. A concentrated load of 8 kN is applied to the tip of the beam at D as shown. Assume that the pin connections at B and C are ideal, meaning that there are no gaps. All dimensions are given in mm. (a) Compute the normal stresses in both the brass and stainless steel bars, (b) Compute the horizontal deflection of the rigid beam at D.

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