Bending stress in a beam with overhang

Constructing the shear diagram

Considering the segment
from x = 0 m to x = 2 m

 area under shear
     diagram =  -8.00 kN-m
 concentrated
   moments =    0.00 kN-m
 change in bending
     moment =  -8.00 kN-m

    at x = 0 m,     M =     0.00 kN-m
 change in bending
           moment   =    -8.00 kN-m
    at x = 2 m,     M =    -8.00 kN-m