A cantilever with a rectangular cross-section, 300 mm wide and 400 mm deep, has a length of 5 m. It supports a point load of 9 kN at the free end as well as a uniformly distributed load of 3 kN/m over the full length. The maximum allowable bending stress in the material is 120 MPa and Young's modulus is 200 GPa. Calculate the following: The maximum bending moment in the beam.