Consider the following statements with regards to the shear force diagram for the beam ABCD:
1. The beam ABCD is an overhanging beam having support at A and D only.
2. The beam carries a point load of 20kN at C.
3. The beam carries a concentrated load of 10 kN at the end B.
4. The beam is an overhanging beam having supports at C and D only.
5. The beam carries a uniformly distributed load of 70 kN over the left hand portion AC only.
Which of the above statements are correct?