An article suggested that yield strength (ksi) for A36 grade steel is normally distributed with μ = 44 and σ = 5.5. USE SALT (a) What is the probability that yield strength is at most 39? Greater than 66? (Round your answers to four decimal places.) at most 39 greater than 66 (b) What yield strength value separates the strongest 75% from the others? (Round your answer to three decimal places.) ksi

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