An article suggested that yield strength (ksi) for A36 grade steel is normally distributed with μ = 45 and σ = 5.0. (a) What is the probability that yield strength is at most 38? Greater than 63? (Round your answers to four decimal places.) at most 38 .0808 Correct: Your answer is correct. greater than 63 .0001 Correct: Your answer is correct. (b) What yield strength value separates the strongest 75% from the others? (Round your answer to three decimal places.) 48.372 Incorrect: Your answer is incorrect. ksi