A, B, C, D, E, F and G are seven offices. F is 6 km to the east of
B. A is 8 km to the north of
B. G is exactly midway between A and
B. C is 10 km to the south of G. E is 3 km to the east of G. D is exactly midway between B and F. If a person walks 4 km towards south from E, takes a right turn and walks for another 3 km, which of the following office would he reach?