Assume that 10% of people are left-handed. Suppose 8 people are selected at random. Answer each question about right-handers below. a) Find the mean and standard deviation of the number of right-handers in the group. 7.2 right-handers σ-085 right-handers (Round to two decimal places as needed.) b) What's the probability that they're not all right-handed? 0.570 Round to three decimal places as needed.) c) What's the probability that there are no more than 7 righties? 0.570 Round to three decimal places as needed.) d) What's the probability that there are exactly 4 of each? 0.00460 (Round to five decimal places as needed.) e) What's the probability that the majority is right-handed? Round to three decimal