It is estimated that, during the past year, 27% of all adults visited a therapist and 44% of all adults used non-prescription antidepressants. It is also estimated that 20% 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 to 2 decimal places.

(b) What is the probability that a randomly selected adult who visited a therapist during the past year also used non-prescription antidepressants? Round your answer to 2 decimal places.

(If necessary, consult a list of formulas.)