For the plane simply-supported beam ABC and loading shown in Figure MKC4, consider the following statements. 1. The shear force is zero at the centre-span of the beam. 2. The shear force in the beam between B and C is constant. 3. The shear force in the beam between A and B is constant. 4. The bending moment varies linearly throughout the length of the beam. 5. The bending moment in the beam between B and C is constant. Which of the statements are true: 5 only 1 and 2 only 2 only 3 and 5 only 1 and 3 only