J. d. power and associates says that 50 percent of car buyers now use the internet for research and price comparisons. (a) find the probability that in a sample of 9 car buyers, all 9 will use the internet. (round your answer to 4 decimal places.) probability (b) find the probability that in a sample of 9 car buyers, at least 6 will use the internet. (round your answer to 4 decimal places.) probability (c) find the probability that in a sample of 9 car buyers, more than 5 will use the internet. (round your answer to 4 decimal places.) probability (d) find the mean and standard deviation of the probability distribution. (round your mean value to 2 decimal places and standard deviation to 4 decimal places.) mean standard deviation