The cantilever beam AB has a rectangular cross section of 150 × 200 mm. Knowing that the tension in the cable BD is 10.8 kN and neglecting the weight of the beam, determine the normal and shearing stresses at the three points indicated. (Round the final answers to two decimal places.) The normal stress at point a is MPa. The shearing stress at point a is MPa. The normal stress at point b is MPa. The shearing stress at point b is MPa. The normal stress at point c is MPa. The shearing stress at point c is MPa