Determine maximum bending stresses

Constructing the moment diagram

Considering the segment
from x = 0 m to x = 1 m

     area under
                shear =   +2.00 kN-m
     concentrated
           moments =     0.00 kN-m
     total bending
            moment =   +2.00 kN-m

        at x = 0 m,   M =     0.00 kN-m
           total bending
             moment   =    +2.00 kN-m
        at x = 1 m,   M =    +2.00 kN-m