For questions 12-14, use the following table, where x represents the number of books read per month during the past year. The probability distribution of x is shown here: 1 4 5 3 P(x) 0.09 0.14 0.31 0.33 0.09 0.04 12. What is P(2 sx < 5)? 13. What is the expected value of X? 14. What is the standard deviation of X?

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