In labrador retreivers, black fur color (B) is dominant to chocolate fur (b). A breeder crosses two heterozygous labs, resulting in a litter of 9 puppies. What is the probability that 4 of the puppies will be black and the rest will be chocolate? (round your answer to 3 decimal places, e.g. 0.050) Ignore all other loci that can affect coat color in dogs.