Is number a1 and 2 rite? If no, what’s the answer ? and how do you do b ? Thank you

yes you are correct

Explanation:

question 2 though be aware that just because 3,4 and 7 havent been diagnosed with the disorder doesnt mean that they are not carriers of it. By saying this you are showing that you are thinking outside of the box and could get a 3/3 mark. But it's pretty good anyway.

i am going to guess that it is co2.

true is the