Find the maximum flexural stress in the bottom material.
Extracted text: Given: Composite beam is made of material 'A’ on top and 'B’ on bottom with dimensions shown. trop M = 6.5 kN-m Etop = 200 GPa Ebottom = 100 GPa b = 175 mm tpottom B- M ttop = 50 mm tbottom = 200 mm b