High blood pressure: A national survey reported that 31% of adults in a certain country have hypertension (high blood pressure). A sample of 21 adults is studied. Round the answer to at least four decimal places.(a) What is the probability that exactly 5 of them have hypertension?The probability that exactly 5 of them have hypertension is(b) What is the probability that more than 7 have hypertension?The probability that more than 7 have hypertension is(c) What is the probability that fewer than 4 have hypertension?The probability that fewer than 4 have hypertension is