My Chickens and I need help?

my chicken laid an egg yesterday at 7:00 AM. how long till she lays another? And how can i tell if my chicken is a rooster?NOT BECAUSE IF SHE LAYS AN EGG ITS A HEN ANSWER!!!!!!!!!! What color eggs would my chickens produce? i have 2 rhode island reds,1 plymouth rock, and a 1 black link? plz leave some websites i can look at? *** NO rude comments or answers!! ***