Draw the influence lines for the reactions at \(A\) and \(F\) and for the shear and moment at section 1 . Using the influence lines, determine the reactions at supports \(A\) and \(F\) if the dead load of the floor system can be approximated by a uniform load of \(10 \mathrm{kN} / \mathrm{m}\). See Figure P12.25.

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15 m B hinge hinge E -20 m-20m- 40 m-20m-20m- D T 30 m