Directions: Six swimmers A, B, C, D, E, F compete in a race. The outcome is as follows. i. B does not win. ii. Only two swimmers separate E & D iii. A is behind D & E iv. B is ahead of E , with one swimmer intervening v. F is a head of D How many swimmers separate A and F?

From our established race order: F(1), D(2), C(3), E(4), B(5), A(6), we need to count how many swimmers separate A and F. A is in position 6, F is in position 1. The swimmers between F and A are: D, C, E, and B. That's 4 swimmers separating A and F. The question asks for the number of swimmers between A and F, which is 4.