Find the value of the maximum transverse shear stress for the beams of the following figur...

Find the value of the maximum transverse shear stress for the beams of the following figures:

Make a sketch for the equivalent loading for the bar of Fig. 1. What must be the dimension b in order that the maximum stress on a typical cross section, such as ABCD, will be equal to 7 MPa? Make sketches and mark values for the stresses due to the separate loads. Also, make the sketch for the resultant stresses and mark values at the corners. Dimension the location of the neutral axis.

Figure 1