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Let Y have the lognormal distribution with mean 78.1 and variance 167.80. Compute the following probabilities....

Let Y have the lognormal distribution with mean 78.1 and variance 167.80. Compute the following probabilities. (You may find it useful to reference the z table. Round your intermediate calculations to at least 4 decimal places, “z” value to 2 decimal places, and final answers to 4 decimal places.)

a. P(Y > 105)

b. P(74 < Y < 105)

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