Study the information carefully to answer the questions.
Seven persons, A, B, C, D, E, F and G are sitting in a straight line (not necessarily in the same order) facing north. Only two persons sit between F and G and G sits second to the left of B.
D sits third to the left of C. E sits exactly between G and B and B sits at the extreme right end of the row.
How many persons sit between F and E?