Multiple choice question please choose the right answer

6. In a city, 22% adults citizens are young (age 18-39), 32% adults citizens are middle-aged (age 40-64), and 46% adults citizens are seniors (age 65+). Diabetes has a prevalence of 4% for young people, 7% for middle-aged people, and 12% for seniors. (The prevalence is the percentage of the people in the corresponding age group who have the disease.) We select at random a adult citizen from this city and we find that this person has diabetes. What is the probability that this person is a senior ?

(A) 0.6389 (B) 0.58 (C) 0.0552 D) 0.0048 E) 0.46

(please show the steps of how you got to the answer)