Consider the standardized random variable X = (W p) f 0' or W = a X + pt, which has a normal distribution, is. X~N{D,1} and W~N{p,az}, and the nonlinear function 1' = exp(W) = exp(aX + :1), what is the probability density function of the random variable Y and what is its range? Note that the resultant random variable has a log-normal distribution