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Please answer both parts using R code: Use the the inverse transformation method to generate a discrete random variable X with P(X = 1) =

Please answer both parts using R code:

Use the the inverse transformation method to generate a discrete random variable X with P(X = 1) = 0.1, P(X = 2) = 0.2, P(X = 3) = 0.3, and P(X = 4) = 0.4.

a) Write a function that inputs an integer n (sample size, i.e., number of observations) and outputs a vector X of length n. The components of X are from {1, 2, 3, 4}.

b) Use set.seed(32951), let n = 100. Calculate the mean and variance of the generated random variable X.

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