Patients being treated with a particular drug run the risk of being allergic to the drug. a patient's reaction to the drug is characterized by doctors as being hyperallergic, allergic, mildly allergic or not allergic, and these have probability values of 0.12, 0.28, 0.33, and 0.27 respectively. suppose nine people are administered the drug and assume that one patient's reaction is independent of another patient's. (a) find the probability that two patients exhibit no reaction. (b) find the probability that no patients are hypoallergenic, one patient is allergic, four patients are mildly allergic, and four patients exhibit no reaction.