Thirty percent of the customers of a grocery store use express checkout. Consider five randomly selected customers, and let x denote the number among the five who use the express checkout. (Round your answer to three decimal places.) n USE SALT (a) Calculate p(1), that is, P(x = 1). P(1) = 0.3602 (b) Calculate P(x s 1). P(x s 1) = 0.5283 (c) Calculate P(2 s x). (Hint: Make use of your answer from part (b).) P(2 s x) = 0.4717 (d) Calculate P(x + 1). P(x + 1) =

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