5. Sampling distribution If X is a random variable following Poisson distribution. X, is an observation (i.e., a random sample point) of X.5.1 Please give the probability distribution of both X and X1. Make sure that you define related parameters properly. [8%] 5.2 From 2.1, using parameters you defined in 2.1, please give the probability distribution of a random sample with sample size of n that consists of X1, X2, ..., Xn as its observations. [8%]