b) Fig. Q2(b) shows the cross-section of a structural member. This section is to be used as a beam spanning 8m between simple supports and carrying a uniformly distributed load of 5kN/m throughout the span. Determine the maximum stresses at the top and bottom of the section due to: (i) Self-weight only; and (ii) Combined self-weight and uniformly distributed load. Take the density of the material in the section as 2200kg/m3. All dimensions in mm, unless otherwise stated. (Hint: Mmax=8wL2 ) [15 mks]