In a certain breed of dog, the dominant, b, is required for black fur; it's recessive, b, produces brown fur.
however, the dominant, i, is epistatic to the color locus and can inhibit pigment formation to produce white fur. the recessive allele, i, on the other hand, permits pigment deposition in the fur.

what would be the phenotypes of the following sets of parents and what would be the results of the mating?

a. bbii x bbli

b. bbli x bbii