It is estimated that, during the past year,27% of all adults visited a therapist and43% of all adults used non-prescription antidepressants. It is also estimated that20% of all adults both visited a therapist and used a non-prescription antidepressant during the past year.

(a) What is the probability that an adult visited a therapist during the past year, given that he or she used non-prescription antidepressants? Round your answer to2 decimal places.

(b) An adult who visited a therapist during the past year is randomly selected. What is the probability this adult used non-prescription antidepressants? Round your answer to2decimal places.