Please explain

Coronaryr {wows surgery: A healthcare research agency reported that 55% of people who had coronary bypass surgery in 2008 were over the age of 65. Eight coronary bypass patients are sampled. Round the answers to four decimal places. (a) What isthe probabity that exacy 2 of them are over theage of 65.? The probabity that exactly 2 of them are over the age of 65 is . (b) What is the probabity' that more than 3 are over the age of 65.? The probabity that more than 3 are over the age {if 65 is B _ [c] What is the probabityr that fewer. than dare over the age of 65'? The probabity'that fewer than'4 are over the age of 65 is is E