So it's 100% likelihood that we're going to have a child. Now, in part A, what is the probability that the child is color blind? And we don't care if the child is male or a female. We simply want to know what is the probability that he or she is colorblind? Well, out of these four cases, two of these cases produce a colorblind individual. So case number one, this colorblind female, and case number two, this color blind male.