In rabbits, C= agouti coat color, c ^ch=chinchilla, c^h=Himalyan, and c=albino. The four alleles constitute multiple allelic series with complete dominance as follows: the agouti C is dominant to the three other alleles , c is recessive to all other alleles, and chinchilla is dominant to Himalayan. Determine the phenotype of progeny from the following crosses:

a) C/c x C/c

b) C/c^h x c^h/c

c) C/c^ch x C/c