Help! Assignment ends tonight! <3 Thank you!

Please give an example of codominance using a chicken with red feathers and a chicken with white feathers. Please explain how this example of codominance is different from parents that pass both dominant and recessive alleles to their offsprings.

In guinea pigs, black fur (b) is dominant over white fur (b). cross a heterozygous (hybrid) black guinea pig with a homozygous (purebred) white guinea pig. complete a punnett square, identify the genotype(s), phenotype(s), and probability (% and fraction) that the offspring will be black and white?