2 new platy fish wondering there gender ?

[Chelipe831]

Hello recently purchased a couple new fish for my aquarium was wondering if anyone can help me identify the gender of the fish? (photo below)

 

[NickAu]

The orange and black one is female, the other one is male

 

[Lunar Jetman]

More details here: http://www.fishforums.net/threads/platy.46309/