Compute the mean and variance of a lognormal variable Y if the mean and the variance of the underlying normal variable are 
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Definitions:
Frequency
The rate at which an event or phenomenon occurs over a specified period of time or within a given sample.
Intensity
The degree of strength, force, or concentration applied in an action or condition.
Adolescence
The transitional stage of physical and psychological development that occurs between childhood and adulthood, typically considered to start with puberty.
Divorce Rates
The statistical measure of the number of divorces that occur within a population during a specified period.
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