Please i beg of you, biology help!?

In Leghorn chickens colored feathers are produced by a dominant allele, C; white feathers are produced by the recessive allele, c. The dominant allele, I, of another independent gene inhibits expression of color in birds with genotypes C/C or C/c. Consequently, both C/-I/- and c/c-/- are white. A colored is mated with a white hen and produces many offspring, all colored. Give the genotypes of both parents and offspring.