From a "Best Practices" perspective, is it better UX design to ask 1 question with a set of 4 radio buttons, 2 questions with a set of 2 radio buttons each, or is this really just splitting hairs?

To provide some context, a specific scenario would include:

1 Question 4 Radio Button Approach:
Question: Would you like to include graphs in your report?
Answer 1: Yes, and I have some specific indices and medians in mind...
Answer 2: Yes, but just give me the basics...
Answer 3: No, but I would like some specific indices and medians for the performance charts...
Answer 4: No, lets keep it simple. Just the basics for the performance charts...

2 Question 2 Radio Button Approach:
Question 1: Would you like to include graphs in your report?
Answer 1: Yes
Answer 2: No
Question 2: Would you like to choose specific indices or medians for your report?
Answer 1: Yes
Answer 2: No