Thirty-three percent of the U.S. adults have a bachelor's degree. You randomly select 6 adults. a. Find the probability that exactly 3 U.S. adults have a bachelor's degree. b. Find the probability that none of the adults have a bachelor's degree. c. Find the probability that more than more 4 adults have a bachelor's degree. d. Find the mean, variance, and standard deviation of the binomial distribution. Interpret your results.