maximum magnitude of bending stress

Question

A mass less beam has a loading pattern as shown in figure. The beam is of rectangular cross section
with a width of 30 mm and height of 100 mm

 The maximum bending moment occurs at
(a) Location B
(b) 2675 m to the right of A
(c) 2500 mm to the right of A
(d) 3225 mm to the right of A

The maximum magnitude of bending stress (in MPa) is given by
(a) 60.0                        (b) 67.5
(c) 200.0                      (d) 225.0