Draw and dimension the load and reaction diagram, the shear diagram, and the bending moment diagram for the beams shown in the following figures:
A fiberboard box of usual construction is shown in Fig. 1. The flaps on the bottom are arranged similarly to those on the top. Find expressions for x, y, and z in terms of volume V that will make the material for the box a minimum for any given value of V.
Figure 1

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