36. Coronary bypass surgery: The Agency for Healthcare Research and Quality reported that 53% of people who had coronary bypass surgery in a recent year were over the age of 65. Fifteen coronary bypass patients are sampled. a. What is the probability that exactly 9 of them are over the age of 65? b. What is the probability that more than 10 are over the age of 65? c. What is the probability that fewer than 8 are over the age of 65? d. Would it be unusual if all of them were over the age of 65? e. What is the mean number of people over the age of 65 in a sample of 15 coronary bypass patients? f. What is the standard deviation of the number of people over the age of 65 in a sample of 15 coronary bypass patients