Radio Buttons

I am creating a questionnaire, where there are yes and no questions that have
radio buttons next to each answer. I have two questions.

1. Currently I have six questions with 6 yes and no questions. When I
click on yes in the first question the radio button lights up. But when I
answer the question in question 2, the first radio button goes away. I think
I am going to need to group the two radio buttons together so that it does
not affect other questions. How do you do that?

2. I want a numbering system so that if they answer yes, it gives a number
value, and if they answer no they get a different number value. Some
questions might have different number values. Is this possible? How can
this be done?

Any help would be greatly appreciated.

Thanks