Market Research conducted a national consumer study of 13787 respondents in the spring of 2009. The respondents were asked to indicate the primary source of the vitamins or minerals supplements they consume. Thirty-five percent indicated a multiple formula was their choice. A subset of 20 respondents who used multiple vitamins was selected for further questioning. Half of them used a One A Day vitamin; the rest used generic brands. Of the subset, 4 were asked to fill out a more complete health survey. a. Calculate the probability that the final selection of 4 subset members were all One A Day multiple vitamins users. b. Calculate the probability that the final selection of 2 or fewer subset members were all One A Day multiple vitamin users. c. Calculate the probability that the final selection of more than 1 subset members were all One A Day multiple vitamin users.