please answer below questions?

1. If one parent begins to show the results of having the dominant disease Marfan Syndrome after the birth of their first child, what is the probability the child would have the disease? (Assume the parent carries 2 Marfan gene's).

2. If you are buying a car and one requires an $800 down-payment with a $326 monthly payment that compounds by 326% a year until the total paid back of $13,000 is recouped by the dealership and the other option requires $4000 down and a 14% simple interest payment of $633 a month until the.$15,000 price tag is paid back. Which car should you choose if you are trying concerned about which one is more financially beneficial? Why should you choose this car?