You need help with sex? Well the only advice I can give is to be very attentive to the needs of your girlf... oh, never mind.

1 and 5 don't seem to know what sex they are yet. You should probably let them grow a while longer. 2 and 3 are definitely males, and 4 is definitely a female. Hermaphrodites usually have a dominant sex, so you should probably keep the ones that are mostly female and pick off their balls. At this point, you're probably going to have hermies in your grow room anyway, and you may as well get bud out of the more female ones.