The probability that a randomly selected adult has ever experienced a migraine headache is 0.35. 12 adults are randomly selected. a. What is the probability that exactly 3 adults have experienced a migraine headache? 0.0000 Round to four decimal places if necessary b. What is the probability that none of them have experienced a migraine headache? 0.0000 Round to four decimal places if necessary c. What is the probability that at most one has experienced a migraine headache? Round to four decimal places if necessary Round to four decimal places if necessary c. What is the probability that at most one has experienced a migraine headache? Round to four decimal places if necessary d. How many adults would you expect to have experienced a migraine headache? Round to the nearest whole number