A company surveyed 2,600 North American airline passengers and reported that approximately 70% said that they carry a smartphone when they travel Suppose that the actual percentage is 70%. Consider randomly selecting six passengers and define the random variable x to be the number of the six selected passengers who travel with a smartphone. The probability distribution of x is the binomial distribution with n 10 and p 0.7. (Hint: Use technology or Table 9 of Appendix A. Round your answers to three decimal places.) (a) Calculate (8) P() (b) Calculate Px $ 7). PIXS 7) = (c) Calculate the probability that more than half of the selected passengers travel with a smartphone