Jane and Mark have three children, a son Bob, a daughter Francine, and another son Alan. Bob meets a woman named Alexandra and they have two children, a son named Nathaniel and a daughter named Emily. Francine marries a man named Anderson and they have one daughter, Millicent, and a son named Fred. Alan marries Erin and they have one son, Robert. Bob. Alan, and Fred aill have a genetic disorder known as Preparation H$.$ On paper, draw a pedigree of the family including those who are Prep H and those who are not. You do not need to submit your pedigree $($you may optionally attach a picture of it if you likel, but use it as a reference in answering the following questions:

a$)$ Based on your pedigree, do you think Prep $H$ is dominant, recessive, incompletely or co$-$dominant, sex$-$linked recessive or dominant, or something else? $(1$ mark$)$

b$)$ Write out and define all possible genotypes related to Prep $H$ and list the resulting phenotypes. Note that you are not asked to list the genotypes and phenotypes of the people described in this pedigree! Youl are orily asked to list the genotypes that are possible $($e$.$g$.$ for a non Prep H example. $BB=$ brown eyes, Bb $-$ brown eyes, bb $=$ green eyes$).(3$ marks$)$