Draw the shear force and bending moment diagrams for the beam shown in Fig Q3. The forces P1 and P2 are 32 and 48 kN respectively and the dimensions e, f and g are 0.8, 0.4 and 0.5 m respectively. The beam has a rectangular cross section with breadth b = 114 mm and depth d = 191 mm, calculate the maximum bending stress in the beam. Put your answer in MPa to an accuracy of two decimal places.