A random variable Y , taking values in R+, is said to have a lognormal distribution with parameters μ and σ2 if lnY ∼ N(μ,σ2). Find the probability density function of Y

1.A random variable Y , taking values in R+, is said to have a lognormal distribution with parameters μ and σ2 if lnY ∼ N(μ,σ2). Find the probability density function of Y .6 marks

2.Suppose that X1 and X2 are independent discrete random variables. Show that the covariance between them is zero.4 marks

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