Among 31- to 36-year-olds, 28% say they have written an editorial letter while under the influence of alcohol. suppose six 31- to 36-year-olds are selected at random. complete parts (a) through (b) below. (a) what is the probability that all six have written an editorial letter while under the influence of alcohol? (round to four decimal places as needed.) (b) what is the probability that none of the six have written an editorial letter while under the influence of alcohol? nothing (round to four decimal places as needed.)