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Problem $05\mathrm{.}009-$ Determining the shear and moment diagrams for a simply supported beam with a uniform distributed load and concentrated load

Consider the beam and loading shown where $\backslash ($ P$=80\backslash$mathrm$\{$kN$\}\backslash ).$

Problem $05\mathrm{.}009.$a $-$ Determining the shear diagram and maximum shear

From the figures given below, identify the correct shear diagram and determine the maximum absolute value of the shear.