In cats, the allele (B) produces black color but (b) produce…

In cats, the allele (B) produces black color but (b) produces a yellow color. These alleles follow the rules of incomplete dominance. A heterozygote produces a tortoise shell color. The alleles (B) and (b) are sex-linked as well. Cross a tortoise shell female with a yellow male. What percent of their offspring will be black?