Problem:

Fred has blood type A and Ethyl has B. Fred's mother was O. Ethyl's parents were both AB.

Question 1: What are Fred and Ethyl's genotypes.

Question 2: They have a kid. What is the chance the kid is type AB?

2. Fred's (a different Fred) blood type is A and Wilma's is AB. Barney's is O and Betty's is B. Their two kids, Pebbles and BamBam, got mixed up at the hospital.

Pebbles is type O and BamBam is B.

Question: Which kid belongs to which parent?

3. Bill is A+ and Hillary is B+. Bill's mother is AB- and his father AB+. Hillary's father is O-. They have a kid.

Question: What is the chance the kid is A+?

Provide a brief explanation for your answer.