70 percent of households say they would feel secure if they had $50,000 in savings. You randomly select 8 8 households and ask them if they would...

70 percent of households say they would feel secure if they had $50,000 in savings. You randomly select 88 households and ask them if they would feel secure if they had $50,000 in savings. Find the probability that the number that say they would feel secure is (a) exactly five, (b) more than five, and (c) at most five.