Bending stress in a beam with overhang

Constructing the shear diagram

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

 area under load
        diagram =  -8.00 kN
 concentrated
           forces =    0.00 kN
 total shear force
         change =   -8.00 kN

    at x = 0 m,       V =     0.00 kN
 total shear force
             change   =    -8.00 kN
    at x = 2 m,       V =    -8.00 kN