john and sue are expecting a child, but are concerned about a rare autosomal recessive disease that is present in both of their families. in the pedigree, john is represented as individual iii‑11 and sue is represented as individual iii‑12; both are unaffected. john's sister, iii‑10, and sue's brother, iii‑13, both do not show evidence of the disease, but john's paternal grandmother and sue's maternal grandfather both had the disease. assign the appropriate symbol to each individual in the pedigree.