3. Let X; ~ Poi(1), i = 1, ...,n, be n = 20 independent Poisson r.v's. Hint: you may use E(Y) = A and Var(Y) = A, for a Poisson r.v. Y ~ Poi(A). 3a. Use the Markov inequality to obtain a bound on Pr ()"_X, > 30) (10.05 is okay). Pr(, Xi > 30) 30) =